Skandapurana 1.3.6.77

1.3.6.77

yathā bhavadbhiḥ pṛṣṭo'haṃ vadanārthe mahātmabhiḥ..
purāvṛttaṃ mayā proktaṃ śivārcanavidheḥ phalam..
śivena dattaṃ sālūpyaṃ na gṛhītaṃ mayā tadā.. 8.77 ..

'Just as I was questioned by you great-souled ones regarding [my] face,
so the ancient occurrence was spoken by me, the fruit of the rite of worshipping Śiva.
Conformity of form [with himself] was given by Śiva, [but] was not accepted by me then.