Sangitisutta 3.1.36

3.1.36

Puna caparaṃ, āvuso, bhikkhu gāmaṃ vā nigamaṃ vā piṇḍāya caranto labhati lūkhassa vā paṇītassa vā bhojanassa yāvadatthaṃ pāripūriṃ.

Furthermore, a mendicant has wandered for alms, and they got to fill up on as much food as they like, coarse or fine.