Bhagavad Gita Chapter 10, Verse 29

अनन्तश्चास्मि नागानां वरुणो यादसामहम् | पितृणामर्यमा चास्मि यमश्चास्मि यमक्षयोः ||

anantaś cāsmi nāgānāṁ varuṇo yādasām aham pitṛṇām aryamā cāsmi yamaś cāsmi yamakṣayoḥ

Among the Nagas, I am Ananta; among aquatic beings, I am Varuna; among ancestors, I am Aryama; and among controllers, I am Yama.

Krishna continues enumerating manifestations in serpents, water, ancestors, and controllers. 'Anantaś cāsmi nāgānām'—among Nagas (serpents), I am Ananta (Shesha), the divine serpent who serves as the bed of Vishnu. 'Varuṇo yādasām aham'—among aquatic beings, I am Varuna, the god of water. 'Pitṛṇām aryamā cāsmi'—among ancestors, I am Aryama, the lord of the ancestors. 'Yamaś cāsmi yamakṣayoḥ'—among controllers, I am Yama, the lord of death. This verse shows Krishna as the source in serpents (Ananta), water (Varuna), ancestors (Aryama), and death (Yama). Each represents the best or most powerful in its category.