Day 31 covers Chapter 27, King Wonderful-Adornment as the Previous Life of a Bodhisattva.
“Thereupon the two sons went up to the sky seven times as high as the tala-tree, and displayed various wonders because they were thinking of their father. They walked, stood, sat, and reclined in the sky. Then they issued water from the upper parts of their bodies, and fire from the lower parts. Then they issued water from the lower parts of their bodies, and fire from the upper parts. Then they became giants large enough to fill the sky, became dwarfs, and became giant again. Then they disappeared from the sky and suddenly appeared on the earth. Then they dived into the earth just as into water, and stepped on the surface of water just as on the earth. [Then they went up to the sky and stayed there.] By displaying these various wonders, they purified the mind of their father, that is, of the king, and caused him to understand the Dharma by faith.