Garudapurana 1.218.22

1.218.22

tatastṛpyasva dakṣiṇābhimukho vāmopavītī tadutsṛṣṭāgrataḥ /
oṃ agnidagdhāśca ye jīvā ye 'pyadagdhāḥ kule mama /
bhūmau dattena tṛpyantu tṛptā yāntu parāṅgatim /
iti bhūmau kuśopari saghṛtamannaṃ jalaplutaṃ vikiret //

Then [saying] 'Be satisfied!', facing south, wearing the sacred thread over the right shoulder, in front of the remains of that food: / 'Oṃ, and those living beings in my lineage who were burned by fire, and those who were not burned by fire, / let them be satisfied by what is given on the earth; being satisfied, let them go to the highest state.' / Thus on the ground, upon kuśa grass, he should scatter food mixed with clarified butter and flooded with water.