Day 13 covers all of Chapter 8, The Assurance of Future Buddhahood of the Five Hundred Disciples.
Having last month considered the Buddha’s prediction for the twelve hundred Arhats in gāthās, we consider the reaction of the twelve hundred Arhats.
Thereupon the five hundred Arhats, having been assured by the Buddha of their future Buddhahood, felt like dancing with joy, stood up from their seats, came to the Buddha, worshipped him at his feet with their heads, and reproached themselves for their faults, saying:
“World-Honored One! We thought that we had already attained perfect extinction. Now we know that we were like men of no wisdom because we were satisfied with the wisdom of the Lesser Vehicle although we had already been qualified to obtain the wisdom of the Tathāgata.
“World-Honored One! Suppose a man visited his good friend. He was treated to drink, and fell asleep drunk. His friend had to go out on official business. He fastened a priceless gem inside the garment of the man as a gift to him, and went out. The drunken man did not notice what his friend had given him. After a while he got up, and went to another country. He had great difficulty in getting food and clothing. He satisfied himself with what little he had earned. Some time later the good friend happened to see him. He said, ‘Alas, man! Why have you had such difficulty in getting food and clothing? T fastened a priceless gem inside your garment on a certain day of a certain month of a certain year so that you might live peacefully and satisfy your five desires. The gem is still there, and you do not notice it. You are working hard, and worrying about your livelihood. What a fool you are! Trade that gem for what you want! You will not be short of anything you want.’ ”