Skandapurana 16.50.5

16.50.5

liṃge'vatārayāmāsa jagaddīpaṃ maheśvaram ..
yaścainaṃ pūjayedbhaktyā naraḥ samyakca paśyati ..
tasya pāpaṃ kṣayaṃ yāti api brahmavadhodbhavam .. 5 ..

and caused Maheśvara, the light of the universe, to descend into the liṅga. / And whatever man worships it with devotion and beholds it properly, / his sin is destroyed, even that arisen from the slaying of a brahmin. 5