Skandapurana 10.100

10.100

prāpya cāśvayuje māsi kṛṣṇapakṣe caturdaśīm .
ahorātroṣito bhūtvā pūjayitvā maheśvaram .
mahāpātakayukto'pi mucyate nātra saṃśayaḥ .. 159.100 ..

Reaching the fourteenth day in the dark fortnight of the month of Āśvayuja,
having fasted for a day and night and worshipped the great lord,
even if guilty of a great sin, he is freed—there is no doubt about this.