Day 17 covers all of Chapter 12, Devadatta, and opens Chapter 13, Encouragement for Keeping this Sutra.
Thereupon Medicine-King Bodhisattva-mahāsattva and Great-Eloquence Bodhisattva-mahāsattva, together with their twenty-thousand attendants who were also Bodhisattvas, vowed to the Buddha:
“World-Honored One, do not worry! We will keep, read, recite and expound this sūtra after your extinction. The living beings in the evil world after [your extinction] will have less roots of good, more arrogance, more greed for offerings of worldly things, and more roots of evil. It will be difficult to teach them because they will go away from emancipation. But we will patiently read, recite, keep, expound and copy this sūtra, and make various offerings to it. We will not spare even our lives [in doing all this].”