The character Myō in the Myōhō Renge Kyō (Sūtra of the Lotus Flower of the Wonderful Dharma) was verified by the tongues of the two Buddhas (Śākyamuni and Many Treasures). The tongues of these two Buddhas are an eightfold double-blooming lotus flower. A wish-fulfilling gem, on top of this double-blooming lotus flower, is the character Myō. This wish-fulfilling gem, the character Myō, contains all the merits of Śākyamuni Buddha’s Six Paramita (the six kinds of practice by which He attained Buddhahood). In a previous life, Śākyamuni offered His own body to a hungry tiger and sacrificed His life to a hawk to save a dove (charity). When He was King Śrutasoma, he did not violate the Buddhist precepts even at the cost of his life (precepts). When he was Hermit Forbearance, he willingly endured the tortures of King Kālika cutting off his four limbs (forbearance). When he was Prince Dāna, he devoted his life to finding a wishfulfilling gem to save people (effort). When he was the Hermit Shōjari, he did not move until the eggs that a heron placed on his head hatched (meditation). And so on. Therefore, we in the Latter Age of Degeneration who simply believe in the Lotus Sūtra are able to receive the same merit gained by practicing the Six Pāramitā in full even if we haven’t performed any good deeds.

Nichimyō Shōnin Gosho, A Letter to Nichimyō Shōnin, Writings of Nichiren Shōnin, Volume 7, Followers II, Pages 138-139

A little background from the Glossary:

Śrutasoma (Shudama-ō)

The Great Wisdom Discourse speaks of this king as the man who never violated the precept against lying. When he was captured by Kalmāsapāda (Rokusoku-ō) to be beheaded, he appealed for a postponement of seven days to fulfill the promise he had made earlier. His appeal was granted and after fulfilling his promise, it is said, Śrutasoma went back to his captor to be killed.

Hermit Forbearance (Ninniku Sennin)

A Jataka tale told in the Kengu-kyō and other sources. When the Buddha was practicing forbearance in his previous life as Hermit Forbearance; he was not moved even when his ears and limbs were cut off and eyes were gouged out. (See King Kālika)

King Kālika (Kariō)

According to a Jataka tale in the Kengu-kyō, the king of Vārāṇasī in a past life met Hermit Forbearance practicing the perseverance paramita in the mountain. In order to test the truth of the hermit’s practice, the king cut off the hermit’s ears and four limbs and gouged out his eyes, but the hermit not only kept his perseverance but also showed his supernatural power of restoring his original body. The king then deeply repented and became deeply religious.

Prince Dāna (Nōse Taishi)

A Jataka tale cited in the Kengu-kyō and other sources. When Śākyamuni Buddha was the crown prince of the kingdom in a past life, he overcame various difficulties to visit the Dragon Palace in the ocean, where he was given the wish-fulfilling gem from the dragon king, thereby he was able to gain infinite amount of food and clothing to save the poor.

Hermit Shōjari

A Jataka tale cited in the Great Wisdom Discourse. When Śākyamuni was practicing meditation as Hermit Shōjari in a previous life, His compassion was said to cover not only people but also all living beings.