Apastambagrihyasutra 7.20.4

7.20.4

yathoḍhamudakāni pradāya trīnodanānkalpayitvāgnimabhyānīyottarairupasparśayitvā uttarairyathāsvamodanebhyo hutvā sarvatassamavadāyottareṇa yajuṣāgniṃ sviṣṭakṛtam \ uttareṇa yajuṣopasthāyottaraissahodanāni parṇānyekaikena dve dve dattvā devasenābhyo daśottarābhyaḥ \ 5 \

He gives them water to drink in the same order in which they have been led (to their places), takes three portions of boiled rice (from the Sthâlîpâka prepared for Îsâna), takes (these portions of rice) to the fire, makes (the three gods) touch them with the next (formulas, II, 18, II-13), sacrifices of these portions, to each god of the portion which belongs to him, with the next (formulas, II, 18, 14-30), cuts off (Avadânas) from all (portions), and sacrifices with the next Yagus (II, 18, 31) to Agni Svishtakrit.