Agni Purana 117.56

117.56

śrāddhādau paṭhite śrāddhaṃ pūrṇaṃ syādbrahmalokadaṃ /
śrāddhaṃ kuryācca putrādiḥ(8) piturjīvati tatpituḥ //

When this is recited at the beginning of an ancestral rite, the rite becomes complete and bestows the world of Brahmā. / And a son or other descendant should perform an ancestral rite for the father, [or] when he is living, for his father;