Matsyapurana 121.78

121.78

ityete parvatāviṣṭāś catvāro lavaṇodadhim
chidyamāneṣu pakṣeṣu purā indrasya vai bhayāt //

Between the Mounts Chakra and Mainâka in the southern portion of the heaven is the Saṃvartaka Agni (volcanic mountain) which drinks the water of the seas. The Agni (volcanic) mountains Aurva, Baḍavâ mukha too are submerged into the Lavaṇa Samudra. These four mountains merged into the ocean (for safety) when Indra began to destroy their wings (by His thunderbolt) and they are still visible on particular days in the bright and dark fortnights.—77-79.