Skandapurana 5.198.161

5.198.161

na mayā paṭhito vedo na ca śāstraṃ nirūpitam..
tīrthayātrāparo'haṃ ca samāyāto bhavatpuram .. 6.199.160
abhadreṇa subhadreṇa śvaśureṇa durātmanā ..
etajjānāmyahaṃ viprā gotraṃ vāsiṣṭhameva vā .. 161 ..

I did not study the Veda, nor have I examined the scriptures. / Dedicated to pilgrimages to sacred fords, I arrived at your city, / [taken in] by my father-in-law, the base-minded Subhadra, who is [in truth] un-auspicious (abhadra). / This [much] I know, O brahmins: either [my] gotra is indeed Vāsiṣṭha,