Ashvalayanagrihyasutra 4.7-27

4.7-27

sampannam iti pṛṣṭvā yad yad annam upayuktam tat tat sthālī pākena saha piṇḍa artham uddhṛtya śeṣam nivedayet./

Having asked them, 'Relished?' and having taken the food, whatever food he has used, together with the Sthâlîpâka, in order to make lumps thereof, he should offer the rest (to the Brâhmanas).