O Mahārāja Parīkṣit, subduer of enemies, this Revata constructed a kingdom known as Kuśasthalī in the depths of the ocean. There he lived and ruled such tracts of land as Ānarta, etc. He had one hundred very nice sons, of whom the eldest was Kakudmī.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सोऽन्तःसमुद्रे नगरीं विनिर्माय कुशस्थलीम् । आस्थितोऽभुङ्क्त विषयानानर्तादीनरिन्दम
so'ntaḥsamudre nagarīṃ vinirmāya kuśasthalīm | āsthito'bhuṅkta viṣayānānartādīnarindama
SB 9.3.28