Bhagavad Gita · 10.28

आयुधानामहं वज्रं धेनूनामस्मि कामधुक्।प्रजनश्चास्मि कन्दर्पः सर्पाणामस्मि वासुकिः॥

āyudhānām ahaṁ vajraṁ dhenūnām asmi kāma-dhuk prajanaśh chāsmi kandarpaḥ sarpāṇām asmi vāsukiḥ

Among weapons, I am the thunderbolt. Among cows, I am the wish-fulfilling cow (Kamadhenu). I am Kandarpa, the god of love, the cause of procreation. Among serpents, I am Vasuki.

— Bhagavad Gita 10.28

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)