Skandapurana 16.69.5

16.69.5

dhanuṣāṃ caturaṃte ca liṃgaṃ pāpabhayāpaham ..
yastatpūjayate bhaktyā liṃgaṃ bhaktiyuto naraḥ ..
kṛṣṇāṣṭamyāṃ viśeṣeṇa sa muktaḥ pātakairbhavet .. 5 ..

at a distance of four bow-lengths, is the liṅga that dispels the fear of sin. / The devoted man who worships that liṅga with devotion, / especially on the eighth day of the dark fortnight, will be freed from sins.