Vishnupurana 2.3.28.p1

2.3.28.p1

iti śrīviṣṇupurāṇe dvitīye 'ṃśe tṛtīyo 'dhyāyaḥ

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.