Shiva Purana
अनंताद्याश्च नागेंद्रा नागैस्तत्तत्कुलोद्भवैः ॥ डाकिनीभूतवेतालप्रेतभैरवनायकाः ॥ ७१ ॥
The kings of serpents, headed by Ananta, were also accompanied by serpents born of their respective families. They became witches, demons, ghosts and fearful heroes.
english translation
anaMtAdyAzca nAgeMdrA nAgaistattatkulodbhavaiH ॥ DAkinIbhUtavetAlapretabhairavanAyakAH ॥ 71 ॥
hk transliteration by Sanscript