Day 31 covers Chapter 27, King Wonderful-Adornment as the Previous Life of a Bodhisattva.

Having last month learned of a Buddha called Cloud-Thunderpeal-Star-King-Flower-Wisdom, a king called Wonderful-Adornment and his wife and two sons, we consider the sons’ request of their mother.

“Thereupon that Buddha expounded the Sūtra of the Lotus Flower of the Wonderful Dharma, wishing to lead King Wonderful-Adornment also out of his compassion towards all living beings. The two sons, Pure-Store and Pure-Eyes, came to their mother, joined their ten fingers and palms together, and said, ‘Mother! Go to Cloud-Thunderpeal-Star-King-Flower-Wisdom Buddha! We also will go to attend on him, approach him, make offerings to him, and bow to him because he is expounding the Sūtra of the Lotus Flower of the Wonderful Dharma to all gods and men. Hear and receive [the sūtra]!’

See Rebirth By Vow