At one time the Buddha was staying near Sāvatthī in the stilt longhouse of Migāra’s mother in the Eastern Monastery, together with a large Saṅgha of around five hundred monks, all of whom were perfected ones.
Now, at that time it was the sabbath—the full moon on the fifteenth day—and the Buddha was sitting in the open surrounded by the Saṅgha of monks for the invitation to admonish.