At SB 3.8.10 the Lord lies 'ahIndra-talpe', on the couch of the serpent king. At SB 3.8.23 Brahma sees Him lying on 'mR^iNAla-gaurAyata-shesha-bhoga-pariya~Nka', the couch of the far-stretching coils of Sesa, white as lotus fibre, where the hoods serve as an umbrella and the lustre of the head-jewels strikes away the darkness in the waters at the end of the age.
Shesha
शेष
Also known as दशशताननः
Śeṣa or Ananta is the serpent king of a thousand hoods upon whom Lord Viṣṇu reclines in the ocean of milk, and who bears all the worlds upon his hoods; at the close of a kalpa the fire from his mouths effects the dissolution, as mentioned also at SB 2.2.26. Balarāma is held to be his descent. His most affecting mention is at SB 2.7.41: 'Śeṣa, the primal god of a thousand mouths, singing His qualities, has not to this day come to His limit' — that even with a thousand mouths and from beginningless time he has not reached the end of the Lord's glories, which stands as the finest proof of their infinity.
Śrīmad Bhāgavata Mahāpurāṇa 2.7.41 — Sanskrit Wikisource (pinned oldid=200170)
Shesha, the primal god of a thousand mouths, singing His qualities, has not to this day reached His limit: 'gayan gunan dasha-shatanana adi-devah shesho 'dhunapi samavasyati nasya param' (SB 2.7.41). Evidence: EXPLICIT.