Bhagavad Gita 10.28

आयुधानमहं वज्रं धेनुनामस्मि कामदुक् |
प्रजानश्चास्मि कन्दर्प: सारणास्मि वासुकि:

Translation

I am the Vajra (thunderbolt) amongst weapons and Kamadhenu amongst the cows. I am Kaamdev, the god of love, amongst all causes for procreation; and amongst serpents, I am Vasuki.