Bhagavatapurana 4.14.10

4.14.10

aher iva payaḥ-poṣaḥ poṣakasyāpy anartha-bhṛt /
venaḥ prakṛtyaiva khalaḥ sunīthā-garbha-sambhavaḥ //

10—11. Just as the nursing with milk of a snake is dangerous even to the man who nurses it, so Vena born of Sunīthā, wicked by nature, being appointed as king (the protector of the people) indeed desires to take the lives of his fellow-creatures; still we would like to pacify him, so that sin may not touch us.