Vishnupurana 3.10.5

3.10.5

yugmāṃstu prāḍmukhānviprānbhojayenmanubheśvara /
yathā tṛptis tathā kuryāddaivaṃ pitryaṃ dvijanmanām //

"When a son is born, let his father perform for him the ceremonies proper on the birth of a child, and all other initiatory rites, as well as a Śráddha, which is a source of prosperity. Let him feed a couple of Brahmans, seated with their faces to the east; and according to his means offer sacrifices to the gods and progenitors. Let him present to the manes balls of meat mixed with curds, barley, and jujubes, with the part of his hand sacred to the gods, or with that sacred to Prajápati. Let a Brahman perform such a Śráddha, with all its offerings and circumambulations, on every occasion of good fortune.