Now, this is a story about a nun named Vi Diệu. Vi Diệu means very wonderful. One time the Buddha was in the country Xá Vệ (Sravasti). At this time, many of the nobles and rich families' daughters, came to the Buddha and became nuns together. One time, they talked to each other like this: "Although we have become nuns, and even though we have the title of Bhiksuni. But concerning the Buddha's teaching, we don't really understand a lot. So, we have not been able to drink the Buddha's ambrosia." They were thinking that their sensual desire and anger and arrogance from time immemorial has not been completely annihilated, nullified. "I think we have to go to the Thâu Lan Nan Đà (Sthulanda)," a great superior mother, nun.