Mahabharata 1.32.24

1.32.24

sūta uvāca |
adho bhūmervasatyevaṃ nāgo'nantaḥ pratāpavān |
dhārayanvasudhāmekaḥ śāsanādbrahmaṇo vibhuḥ || 24 ||

"Sauti continued, 'The snake, Sesha, the lord Ananta, of great prowess, lives underneath the Earth, alone supporting the world at the command of Brahman. And the illustrious Grandsire, the best of the immortals, then gave unto Ananta the bird of fair feathers, viz., the son of Vinata, for Ananta's help.'"