Vishnupurana 2.3.27

2.3.27

navavarṣaṃ tu maitreya jambudvīpamidaṃ mayā /
lakṣayojanavistāraṃ saṃkṣepāt kathitaṃ tava //

I have thus briefly described to you, Maitreya, the nine divisions of Jambu-dwípa, which is a hundred thousand Yojanas in extent, and which is encircled, as if by a bracelet, by the ocean of salt water, of similar dimensions.