Bhagavad Gita Chapter 10.28
āyudhānām ahaḿ vajraḿ
dhenūnām asmi kāma-dhuk
prajanaś cāsmi kandarpaḥ
sarpāṇām asmi vāsukiḥ
Translation
Of weapons I am the thunderbolt; among cows I am the surabhi. Of causes for procreation I am Kandarpa, the god of love, and of serpents I am Vasuki.