Skandapurana 6.3.44.25

6.3.44.25

mucyante pātakaiḥ sarvairajñānajñānasaṃcitaiḥ .
guhāmadhye praviṣṭastu japetsūktaṃ tu tryakṣaram .. 44.25 ..

They are freed from all sins accumulated consciously or unconsciously. / Entering into the cave, one should chant the three-syllabled hymn;