Skandapurana 1.4.66.33

1.4.66.33

rūpavaṃtamadhīyānamekamekāṃtacāriṇam..
tasya vai tapasā vīra tadvanaṃ tejasāvṛtam.. 1.33 ..

handsome, studying [the Vedas], alone, wandering in solitude.
By his austerity indeed, O hero, that forest was enveloped in fiery splendor;