Garudapurana 1.219.1

1.219.1

śrīgaruḍamahāpurāṇam- 219
brahmovāca /
nityaśrāddhaṃ pravakṣyāmi pūrvavattadviśeṣavat /
oṃ amukagotrāṇāmasmatpitṛpitāmahānāṃ amukaśarmaṇāṃ sapatnīkānāṃ śrāddhaṃ siddhānnena yuṣmāsvahaṃ kariṣye /
āsanādikamatra syādviśvedevāvivarjitam //

The glorious Garuḍa Mahāpurāṇa — [Chapter] 219
Brahmā said: / I shall declare the daily śrāddha; it is like the preceding one, with its specific rules: / "Om, for our father and grandfathers of such-and-such gotras, of such-and-such names, along with their wives, I shall perform the śrāddha among you with cooked food." / The seat and so forth are used here, except for the Viśvedevas.