Skandapurana 6.2.85.72

6.2.85.72

71 atha prayāgeśvaraliṃgamāhātmyavarṇanam, tatra śaṃtanunā vṛtāyā gaṃgāyā aṣṭaputraprāptivarṇanam gaṃgāyā manuṣyayonito muktiprāptyarthaṃ nāradavacanātprayāgeśvare gamanam, liṃgapūjanena pāpānnivṛttiḥ prayāgeśvaraliṃgamāhātmyavarṇanam ... ... 152 2

71. Now, the description of the māhātmya of the Prayāgeśvara liṅga: Therein, the description of Gaṅgā, chosen by Śaṃtanu, obtaining eight sons; Gaṅgā going to Prayāgeśvara on Nārada's advice to obtain release from human birth; cessation from sin by worship of the liṅga; the description of the māhātmya of the Prayāgeśvara liṅga. (152.2)