Vishnupurana 2.2.5

2.2.5

jambūplakṣāhvayau dvīpau śālmalaś cāparo dvija
kuśaḥ krauñcas tathā śākaḥ puṣkaraś caiva saptamaḥ //

The seven great insular continents are Jambu, Plaksha, Sálmali, Kuśa, Krauncha, Śáka, and Pushkara: and they are surrounded severally by seven great seas; the sea of salt water (Lavańa), of sugar-cane juice (Ikshu), of wine (Surá), of clarified butter (Sarpi), of curds (Dadhi), of milk (Dugdha), and of fresh water (Jala).