Anubuddhasutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā vajjīsu viharati bhaṇḍagāme. Tatra kho bhagavā bhikkhū āmantesi: “bhikkhavo”ti. “Bhadante”ti te bhikkhū bhagavato paccassosuṁ. Bhagavā etadavoca:
Understood
So I have heard. At one time the Buddha was staying in the land of the Vajjis at Wares Village. There the Buddha addressed the mendicants, “Mendicants!” “Venerable sir,” they replied. The Buddha said this: