The Sūtra of Transmission of the Buddhist Teaching, fascicle 1, speaks of the previous life of Venerable Kāśyapa:
Once upon a time there lived a Brahman named Nyagrodha in the Kingdom of Magadha. Because of the great merit of his good acts for a long time in a previous life… , he was immensely rich and piled up vast wealth in this life. … which was worth a thousand times more than that of the king of Magadha. (…) Although he was very wealthy, he was childless, so the Brahman said to himself, “My days are numbered, but I have nobody to inherit my treasures filled in the warehouse. I wish to have a child.” Thus, the Brahman prayed to the forest god in the neighborhood for good luck of having a child. Having prayed for years without any luck, he became furious and said to the forest god: “I have prayed to you for the last several years to no avail. I am going to pray to you from the bottom of my heart for seven more days. If it does not do any good, I am going to burn down your shrine.” Hearing this, the forest god in agony relayed his problem to the Four Heavenly Kings, who in turn reported the matter to Indra.
Indra looked around all over the world but could not find anyone worthy of being Nyagrodha’s child, so he went to the King of the Brahma Heaven for help. With his divine eye, the King of the Brahma Heaven then closely observed the whole world, finding a heavenly being in the Brahma Heaven who was about to die. The King told him that if he was to be reborn in the human world, he should be born as a child of Nyagrodha Brahman in Jambudvīpa. The dying being answered that he did not want to be reborn in a family of a Brahman because Brahman dharma includes many evil and false views. The King of the Brahma Heaven told him again: “Nyagrodha Brahman is a powerful man of virtue that there is no one in the world worthy to be born as his child. If you are reborn to his family, I will protect you lest you should fall into evil view.” Thereupon the heavenly being in the Brahma Heaven answered, “I will respectfully follow your words.”
The King of the Brahma Heaven then reported the turn of events to Indra, who in turn informed the forest god. Elated by the good news, the forest god called upon the Brahman at home saying, “You should no longer have a grudge against me. Your wish will be fulfilled in seven days. As expected, the wife of the Brahman became pregnant in seven days and gave birth to a baby boy ten months later. (…) This is Venerable Kāśyapa today.
Kangyō Hachiman-shō, Remonstration with Bodhisattva Hachiman, Writings of Nichiren Shōnin, Doctrine 1, Page 270-271