Brahmandapurana 2.8.13

Brahmāṇḍapurāṇa 2.8.13

sarveṣāṃ daṃṣṭriṇāṃ śeṣaṃ nāgānāmatha vāsukim /
sarīsṛpāṇāṃ sarpāṇāṃ pannagānāṃ ca takṣakam //