Day 31 covers Chapter 27, King Wonderful-Adornment as the Previous Life of a Bodhisattva.
Thereupon the Buddha said to the great multitude:
“Innumerable, inconceivable, asaṃkhya kalpas ago, there lived a Buddha called Cloud-Thunderpeal-Star-King-Flower-Wisdom, the Tathāgata, the Arhat, the Samyak-sambuddha. His world was called Light-Adornment; the kalpa in which he lived, Gladly-Seen. Under that Buddha lived a king called Wonderful-Adornment. His wife was called Pure-Virtue. They had two sons, Pure-Store and Pure-Eyes by name. The two sons had great supernatural powers, merits, virtues and wisdom. A long time ago, they had already practiced the Way which Bodhisattva should practice. They had already practiced the dana-pāramitā, the sita-pāramitā, the kṣānti-pāramitā, the vīrya-pāramitā, the dhyāna-pāramitā, the prajña-pāramitā, and the pāramitā of expediency. They also had already obtained the four states of mind towards all living beings:] compassion, loving-kindness, joy and impartiality. They also had already practiced the thirty-seven ways to enlightenment. They had done all this perfectly and clearly. They also had already obtained the samādhis of Bodhisattvas: that is, the samādhi for purity, the samādhi for the sun and the stars, the samādhi for pure light, the samādhi for pure form, the samādhi for pure brightness, the samādhi for permanent adornment, and the samādhi for the great treasury of powers and virtues. They had already practiced all these samādhis.