SB 10.1.20

After reaching the shore of the ocean of milk, the demigods worshiped the Supreme Personality of Godhead, Lord Viṣṇu, the master of the whole universe, the supreme God of all gods, who provides for everyone and diminishes everyone's suffering. With great attention, they worshiped Lord Viṣṇu, who lies on the ocean of milk, by reciting the Vedic mantras known as the Puruṣa-sūkta. KB 10.1.20 Arriving on the shore of the milk ocean, Lord Brahmā began to pacify Lord Viṣṇu, who had formerly saved the earthly planet by assuming the transcendental form of a boar. In the Vedic mantras, there is a particular type of prayer called Puruṣa-sūkta. Generally, the demigods offer their obeisances unto Viṣṇu, the Supreme Personality of Godhead, by chanting the Puruṣa-sūkta. It is understood herein that the predominating deity of every planet can see the supreme lord of this universe, Brahmā, whenever there is some disturbance on his planet. And Brahmā can approach the Supreme Lord Viṣṇu, not by seeing Him directly but by standing on the shore of the ocean of milk. There is a planet within this universe called Śvetadvīpa, and on that planet there is an ocean of milk. It is understood from various Vedic literatures that just as there is the ocean of salt water on this planet, there are various kinds of oceans on other planets. Somewhere there is an ocean of milk, somewhere there is an ocean of oil, and somewhere there are oceans of liquor and of many other types of liquids. The Puruṣa-sūkta is the standard prayer which the demigods recite to appease the Supreme Personality of Godhead, Kṣīrodakaśāyī Viṣṇu. Because He is lying on the ocean of milk, He is called Kṣīrodakaśāyī Viṣṇu. He is the form of the Supreme Personality of Godhead through whom all the incarnations within this universe appear. After all the demigods offered the Puruṣa-sūkta prayer to the Supreme Personality of Godhead, they apparently heard no response.