Bhagavatapurana 3.8.30

3.8.30

carācarauko bhagavan-mahīdhram ahīndra-bandhuṃ salilopagūḍham /
kirīṭa-sāhasra-hiraṇya-śṛṅgam āvirbhavat kaustubha-ratna-garbham //

30. (He saw the Lord), who is like unto a mountain on whom abides the world mobile and immobile, who is the friend of the best of serpents, who is in the midst of waters, whose thousand crowns are like golden summits and on whose bosom emerges into view the gem of Kaustubha.