The Great Epic of the Bhārata dynasty 6.12.4

6.12.4

saṃjaya uvāca |
rājansubahavo dvīpā yairidaṃ saṃtataṃ jagat |
sapta tvahaṃ pravakṣyāmi candrādityau grahāṃstathā || 4 ||

"Sanjaya said,--'There are, O king, many islands, over which the Earth extended. I will describe to thee, however, only seven islands, and the moon, and the sun, and the planet (Rahu), also. The Jamvu mountain, O king, extends over full eighteen thousand and six hundred Yojanas. The extent of the salt ocean is said to be twice this. That ocean is covered with many kingdoms, and is adorned with gems and corals. It is, besides, decked with many mountains that are variegated with metals of diverse kinds. Thickly peopled by Siddhas and Charanas, the ocean is circular in form.