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.