Garudapurana 1.220.2

1.220.2

One should perform the sapiṇḍīkaraṇa in the afternoon, just as before. / The invitation of the brāhmaṇas for the grandfather and others. / "Oṃ, to the gods named Purūravas and Ārdrava, this seat, homage!" / And giving the seat on the left side. / The invocation. / Then receiving permission: "I shall perform the śrāddha of the grandfather, great-grandfather, and great-great-grandfather, along with their wives"; arranging three vessels; placing kuśa grass on the vessel; covering it with another vessel; concluding with the determination of unbrokenness; and in the same way, obtaining permission to perform the śrāddha of the father too, along with his wife, by his name ending with the word 'preta'; and the determination of unbrokenness for the gods' vessel.