Shiva Purana
नाभागो दिष्टपुत्रोऽभूत्स तु ब्राह्मणतां गतः ॥ स्वक्षत्रवंशं संस्थाप्य ब्रह्मकर्मभिरावृतः॥ ४८॥
Nābhāga had a son Dhṛṣṭa. After establishing the Kṣatriya race and performing the brahminical rites he attained brahminhood.
english translation
nAbhAgo diSTaputro'bhUtsa tu brAhmaNatAM gataH ॥ svakSatravaMzaM saMsthApya brahmakarmabhirAvRtaH॥ 48॥
hk transliteration by Sanscript