Skandapurana 6.3.57.14

6.3.57.14

padmakaṃ nāma parvaitadayanādicaturguṇam .
atra dattaṃ hutaṃ japtaṃ sarvaṃ bhavati cākṣayam .. 57.14 ..

This festival named Padmaka bears fourfold the fruit of a solstice and the like; / whatever is given, offered in fire, or muttered here becomes imperishable.”