Bhagavatapurana 8.16.43

8.16.43

kṛtvā śirasi taccheṣāṃ devamudvāsayet tataḥ /
dvyavarān bhojayedviprān pāyasena yathocitam //

43. Having worn on his head the flowers and other things offered (to the Lord) he should then pray for the retirement thence of the Deity; Brahmins, at least two, must be properly fed (with food cooked) with milk.