Agniveshyagrihyasutra 3.11.2.10

3.11.2.10

añjanādinā piṇḍamalaṅkṛtya brāhmaṇaṃ sampūjyāṅguṣṭhamūlamupasaṃgṛhya bhuṅkṣva ityāha bhujyata ityuktvā atha bhuñjāne sarveṣāmucchiṣṭaṃ nidhāyācānte barhīṣyavakīrya nyubjapātraṃ svaditam iti brāhmaṇo brūyāt \

Having decorated the ancestral ball of rice with collyrium and the like, having honored the Brahmin, and having seized the root of [his] thumb, he says: "Eat!" Saying "It is being eaten", then while he is eating, having set aside the leavings of all [food], after he has sipped water, having scattered [food] upon the sacred grass, the Brahmin should say: "The overturned vessel is savored."