The first version, Syaikh Jangkung or Mbah Saridin was the son of Ki Ageng Kiringan (Syaikh Abdullah Asyiq bin Abdul Syakur) together with Nyai Ageng Dewi Limaran (Nyai Ageng Kiringan) who lived in Tayu, Pati. According to the story, this couple had not been blessed with children for a long time. They conveyed this condition to Sunan Muria, who was Ki Ageng Kiringan's teacher. Raden Umar Said, another name for Sunan Muria, asked them to be patient and practice special prayers, until finally they were given the gift of a child. After visiting Sunan Muria, it is said that Nyai Ageng Kiringan met an old grandfather who told her that Allah had blessed her request and that soon, she would have a son. The boy was then given the name Saridin, which means Valid and Ridla, namely valid and received the approval of Allah SWT. (Swidarto via Ulum, 2017: 16).

The second version states that Mbah Saridin was the son of Dewi Samaran, the wife of Sunan Muria, the older brother of Sunan Kudus. However, Mbah Saridin was not the son of Sunan Muria's relationship with Dewi Samaran. It is said that before she became pregnant with Mbah Saridin, Dewi Samaran had a dream. In the dream, Dewi Samaran was visited by a brave and handsome man, but his hair was already starting to turn gray. Then, she told her dream to her husband, Sunan Muria, and not long after she became pregnant. The incident had devastated Sunan Muria because he thought that Dewi Samaran must have committed an affair. Sunan Muria expelled Dewi Samaran from Muria. Because she felt that she had done nothing wrong and was helpless, Dewi Samaran was desperate and decided to commit suicide. When she was about to commit suicide, she was suddenly met by Sunan Kalijaga and forbade her from committing suicide. After giving birth, Dewi Samaran gave the baby to Ki Ageng Kiringan, a student of Sunan Muria to be cared for like Ki Ageng Kiringan's other child, Branjung. Then, instead of returning to Muria, Dewi Samaran continued to walk to the south coast (Abdurrahim via Ulum, 2017: 17). In line with this version, in the following period, Mbah Saridin was married to Dewi Sarini who came from Miyono, Pati and was blessed with a child named Momok.

The third version states that Syaikh Jangkung was a descendant of Syarifah Attaji (Rasmi) with Prince Syafi'i (Ki Ageng Natas Tuban). According to this version, Syaikh Jangkung or Mbah Saridin's real name was Sayid Syarifudin bin Syarif Syafi'i from Singaparna, West Java. His mother was Dewi Rasmi or Dewi Sekar Tanjung, daughter of Datuk Amir, daughter of Sayid Hamzah, daughter of Ratu Ayu, daughter of Syarif Hidayatullah or also known as Sunan Gunungjati. As a descendant of nobility and a cleric, Syaikh Jangkung helped develop the mandate of the Sultan of Cirebon to crush the Trunajaya rebellion that had kidnapped the daughter of the Sultan of Cirebon, Ratu Pandan Arum (Mahmudi via Ulum, 2017: 18). Of the three versions, the third version is considered closer to the truth. This is especially when connected with the version stating that Syaikh Jangkung or Mbah Saridin married Sultan Agung's older sister, Retno Jinoli. At that time, it is said, Sultan Agung had ruled in Java from 1591-1646.

The phenomenal figure of Mbah Saridin is often associated with his story when he studied with Prince Kudus (a descendant of Sunan Kudus). It is said, Syaikh Jangkung studied with Prince Kudus, after his eldest child, Momok, was born from his marriage to Dewi Sarini. Little Momok was entrusted to Syaikh Jangung's older sister, Nyai Branjung. After stating his intention to study, Prince Kudus happily accepted him as a student. Sheikh Jangkung expressed his intention to seek knowledge of Sufism (Sufism) to Prince Kudus. In Kudus, Sheikh Jangkung served Prince Kudus by filling water in the kulah (pool) to be used for bathing and ablution and taking care of the gutters. Almost certainly, Sheikh Jangkung's time was always filled with filling water, without following the religious studies taught by Prince Kudus. When filling water, Sheikh Jangkung always used a basket with holes. But miraculously, the water in the basket did not spill. Another strange thing was that the gutters he cleaned always had lots of fish. He also stated to Prince Kudus that everything that has water, must have fish.

Hearing this, Prince Kudus, the teacher, tried to give Mbah Saridin a test whether there was fish in the jug held by Prince Kudus at that time. It turned out that after it was opened, there was a wader fish in the jug. When asked once again whether there was also fish in the degan (young coconut) in Prince Kudus's hand. It turned out that after the coconut was split, there was a kutuk fish in it. Seeing the behavior of his student, Prince Kudus felt uneasy. Syaikh Jangkung was considered to be showing off his knowledge and had violated the rules of the school not to riya (show off) the knowledge he had. Finally, when Prince Kudus tested Syaikh Jangkung again with questions about monotheism and what the shahada was, instead of answering, Syaikh Jangkung climbed a tall coconut tree and threw himself down. After falling from the tall coconut tree and surviving, he answered the teacher's question, this is the shahada. According to Mbah Saridin, he fell and survived because of the permission of Allah SWT, and this is the shahada. This act of showing off his supernatural powers made Pangeran Kudus even more unhappy. As a result, Mbah Saridin was expelled from the school. The two events related to the coconut fruit, namely the coconut containing the fish and Mbah Saridin's fall from the coconut tree, were immortalized with an artistic ornament of two green coconuts at the entrance to the tomb (Interview with Damanhuri, Caretaker of the Tomb of Syaikh Jangkung Landoh, July 23, 2019).

After being expelled from Kudus, Mbah Saridin then met Sunan Kalijaga (Syaikh Malaya) and was appointed as his student. The symbol of the two coconuts is also associated with the practice carried out by Mbah Saridin who performed asceticism in the ocean using two coconuts for eight years, an order from his teacher, Sunan Kalijaga. This asceticism, called tapa ngrombang, was carried out as a requirement to obtain the knowledge of nature. It is said that he meditated until he entered the sea area of the Palembang Sultanate. At that time, Palembang led by Prince Ratu was experiencing a pageblug (a disaster that never stopped). Hearing that there was a hermit in his waters, the Prince ordered his guards to look for the hermit until he found him. Finally, with his charisma, Mbah Saridin's prayer to remove the disaster from the land of Palembang was granted by Allah SWT. The Prince was very happy and as a reward for his services, Mbah Saridin received a gift of half his power (Serat Seh Jangkung via Ulum, 2017: 39-40).

After his duties in Palembang were completed, Mbah Saridin returned to Java and continued his asceticism on the coast of Cirebon. At that time, the Cirebon Sultanate was also experiencing a prolonged disaster. In his meditation, the Sultan of Cirebon received a supernatural whisper, that he had to meet a hermit on Cirebon Beach. In his meditation, the Sultan of Cirebon also received a whisper to marry the hermit to his daughter, Ratu Pandan Arum. Finally, Mbah Saridin's prayers and asceticism to expel the plague in the Cirebon area were granted by Allah SWT. Mbah Saridin also followed the Sultan's wishes to marry his daughter. From his marriage, Mbah Saridin was blessed with a child named Mukmin. However, only after 17 months of Mukmin's age, the Queen passed away.

The name of Mbah Saridin who succeeded in banishing the plague in Cirebon was so fragrant and was heard as far as Banten. At that time, the Banten Sultanate was experiencing political chaos due to the struggle for power after the death of Sultan Maulana Yusuf who died in 1589. When the Sultan died, the sultan's children were still young. As a result, the Prince of Jepara, who claimed to still have the right to the throne, demanded to become the Sultan of Banten. Finally, Syaikh Jangkung or Mbah Saridin was asked to reconcile the warring parties. After going through various long processes, Mbah Saridin was finally able to calm the conflict that occurred. For his services, the ruler of Banten intended to give a reward to Mbah Saridin. However, that intention was rejected by Mbah Saridin.

After resolving the conflict in Banten, Syaikh Jangkung continued his wanderings along the North Coast of Java, until he finally arrived in an area in Kendal. There, he built a village and named it Landoh. In Kendal, he taught Islam while continuing his asceticism. The area where he meditated was a swamp known as Rawa Nglogung. At night, he would meditate in the swamp and during the day he would return to the village. One night, while he was meditating in the swamp, he used his supernatural powers to gather all the animals in the forest, from tigers, snakes, lions, deer, and others. This news had shocked the land of Kendal until it reached the ears of the ruler of Mataram. The ruler of Mataram at that time, Sultan Agung, ordered his guards to find out who Sheikh Jangkung was and bring him to the Mataram Palace in Yogya. In Yogya, Sheikh Jangkung was welcomed happily by Sultan Agung. Every night, the two of them were involved in discussions about true knowledge and became increasingly compatible. To strengthen their relationship, Sultan Agung asked Sheikh Jangkung to marry his sister, Retno Jinoli. Not only that, Syaikh Jangkung was even given a gift in the form of the Mataram region, such as Landoh, Miyona, Karingan, Pajenggotan, Satiabrit, Gadhu, Bonthos, Sukolilo, Kanthil, Karangsumber, Wanakusumo, Jrambah, Jember, Ngering, Dremaya, Thuwaran, Watulunyu, Krapyak, Mandhak, Widuri, Panjunan, and Gebangonan. He also received a new title, namely Panembahan, a title that would be inherited by his descendants in the following period. 

After feeling that everything was enough, he felt he had to leave the palace and continue his wanderings. Although the Sultan felt heavy-hearted, he finally granted Syaikh Jangkung's wish. Based on the inspiration he received, Syaikh Jangkung decided to move to the Kayen area in Pati. There, he built a village and hermitage with the same name as in Kendal, namely Landoh. At that time, the Pati region was under the rule of Duke Kembangjoyo or with the title Wasis Joyokusumo.

Haul Syaikh Jangkung is commemorated on 15-16 Rajab. On these commemorative nights, many pilgrims come. Haul Syaikh Jangkung begins with a mosquito net changing event followed by a religious study and night market. During the haul of Syaikh Jangkung, many visitors come not only from Pati residents, but also from various provinces and even abroad, such as West Java, East Java, Sumatra, Malaysia and Singapore. Apart from the haul day, the tomb of Syaikh Jangkung is crowded with visitors on Friday or Thursday nights. The caretaker and 11th descendant of Syaikh Jangkung, namely R.H. Damhari Panoto Jiwo, stated that one of the relics left by Syaikh Jangkung is the Ndonga well (Tirta Usada/medicinal water). The well was previously used by Mbah Saridin (Syaikh Jangkung) to drink when he was not given a drink by the villagers considering that at that time it was really dry and a drought season. From that incident, Saridin stuck the heirloom into the ground and water appeared.

As a spreader of Islam, Syaikh Jangkung has many teachings in the form of advice. One of them is, "aja njikuk nek gak dikongkon, aja njaluk nek gak nggone". The meaning of this teaching is do not take if not ordered or do not get permission from the owner, do not ask if it is not his. Syaikh Jangkung also taught: "aja drengki, aja srei, aja ganti padu, aja dahwen kemeren, aja kutil jumput, aja bedhog colong". Through these teachings, Syaikh Jangkung teaches to prioritize honesty, sincerity, and independence. Syaikh Jangkung also teaches not to hate each other, be jealous, and like to fight (Interview with Damanhuri, Caretaker of Syaikh Jangkung's Tomb, April 13, 2019).