Vishnupurana 2.4.9

2.4.9

teṣu puṇyā janapadāś cirāc ca mriyate janaḥ
nādhayo vyādhayo vāpi sarvakālasukhaṃ hi tat //

Medhatithi, who was made sovereign of Plaksha, had seven sons, Śántabhaya, Śiśira, Sukhodaya, Ánanda, Śiva, Kshemaka, and Dhruva; and the Dwípa was divided amongst them, and each division was named after the prince to whom it was subject. The several kingdoms were bounded by as many ranges of mountains, named severally Gomeda, Chandra, Nárada, Dundubhi, Somaka, Sumanas, and Vaibhrája. In these mountains the sinless inhabitants ever dwell along with celestial spirits and gods: in them are many holy places; and the people there live for a long period, exempt from care and pain, and enjoying uninterrupted felicity. There are also, in the seven divisions of Plaksha, seven rivers, flowing to the sea, whose names alone are sufficient to take away sin: they are the Anutaptá, Śikhí, Vipásá, Tridivá, Kramu, Amritá, and Sukritá. These are the chief rivers and mountains of Plaksha-dwípa, which I have enumerated to you; but there are thousands of others of inferior magnitude. The people who drink of the waters of those rivers are always contented and happy, and there is neither decrease nor increase amongst them, neither are the revolutions of the four ages known in these Varshas: the character of the time is there uniformly that of the Treta (or silver) age. In the five Dwípas, worthy Brahman, from Plaksha to Śáka, the length of life is five thousand years, and religious merit is divided amongst the several castes and orders of the people. The castes are called Áryaka, Kuru, Vivása, and Bháví, corresponding severally with Brahman, Kshetriya, Vaiśya, and Śúdra. In this Dwípa is a large fig-tree (F. religiosa), of similar size as the Jambu-tree of Jambu-dwípa; and this Dwípa is called Plaksha, after the name of the tree. Hari, who is all, and the creator of all, is worshipped in this continent in the form of Soma (the moon). Plaksha-dwípa is surrounded, as by a disc, by the sea of molasses, of the same extent as the land. Such, Maitreya, is a brief description of Plaksha-dwípa.