Skandapurana 5.166.74

5.166.74

etatkarma mayā kāryaṃ yathā syādbrahmajaṃ balam ..
tyaktvā caiva nijaṃ rājyaṃ cariṣyāmi mahattapaḥ.
evaṃ sa niścayaṃ kṛtvā rājye saṃsthāpya vai sutam..
nāmnā viśvasahaṃ khyātaṃ prajagāma tapovanam..74..

I must do this work so that strength born of a brāhmaṇa may be mine;
and giving up my own kingdom, I shall perform great austerity.”
Having made this resolution and established his son,
renowned by the name of Viśvasaha, upon the throne, he went to the penance grove.