Bhagavad Gita Chapter 10
During the churning of the ocean, various divine entities emerged
āyudhānāmahaṁ vajraṁ dhenūnāmasmi kāmadhuk prajanaścāsmi kandarpaḥ sarpāṇāmasmi vāsukiḥ
Of the weapons, I am the thunderbolt. Of the cows, I am Kamadhenu; For begetting children, I am the god of love. Of the snakes, I am Vasuki