Skandapurana 16.166.129

16.166.129

idamudyāpanaṃ devi sāvitryāstu vratasya ca ..
sarvapātakaśuddhyarthaṃ kāryaṃ devi naraiḥ sadā ..
akāmataḥ kāmato vā pāpaṃ naśyati tatkṣaṇāt .. 129 ..

This concluding rite of the vow of Sāvitrī, O goddess, / should always be performed by men to purify all sins; / whether unintentionally or intentionally, sin is destroyed in that very moment. // 129