Skandapurana 1.2.25.18

1.2.25.18

17 atha śivapārvatyorvihāravarṇanam, kṛtasya tapaso vṛttāntavarṇane tatra cānekacaritapuraḥsaraṃ caturmukhanārāyaṇayorherambaṣaḍānanatvādivṛttāntavarṇanam ... 249

17. Now the description of the sporting of Śiva and Pārvatī; in the narration of the account of the austerity performed, preceded by various deeds there, the narration of the account of the four-faced Brahmā and Nārāyaṇa becoming Heramba and the six-faced [Skanda], and so forth... 249