Soon after those nuns had left, the Buddha addressed the mendicants: “Suppose, mendicants, it was the sabbath of the fifteenth day. You wouldn’t get lots of people wondering whether the moon is full or not, since it is obviously full. In the same way, those nuns were uplifted by Nandaka’s Dhamma teaching, and they got all they wished for. Even the last of these five hundred nuns is a stream-enterer, not liable to be reborn in the underworld, assured, destined for awakening.” That is what the Buddha said. Satisfied, the mendicants approved what the Buddha said.
Middle Discourses 147 The Shorter Advice to Rāhula