SB 5.20.7
plaksah sva-samaneneksu-rasodenavrto yatha tatha dvipo ’pi salmalo dvi-guna-visalah samanena
surodenavrtah parivrnkte.
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Plaksadvipa is surrounded by an ocean of sugarcane juice, equal in breadth to the island itself. Similarly, there is then another island — Salmalidvipa — twice as broad as Plaksadvipa [400,000 yojanas, or 3,200,000 miles] and surrounded by an equally broad body of water called Surasagara, the ocean that tastes like liquor.