Manifestation of the oceans
Appearance
Srimad-Bhagavatam
SB Canto 3
SB 3.26.60, Translation: Next grew feelings of hunger and thirst, and in their wake came the manifestation of the oceans. Then a heart became manifest, and in the wake of the heart the mind appeared.
SB 3.26.68, Translation: The ocean entered His abdomen with hunger and thirst, but the Cosmic Being refused to rise even then. The moon-god entered His heart with the mind, but the Cosmic Being would not be roused.