Skandapurana 16.246.7

16.246.7

darśanātpitṛmedhasya lapsyate mānavaḥ phalam ..
snānena dviguṇaṃ puṇyaṃ tarpaṇena caturguṇam .. 7 ..

From the sight of it a man shall obtain the fruit of a Pitṛmedha sacrifice; / by bathing [he gains] double the merit, and fourfold by offering libations;