《水经注·卷一》
《山海经》说：南边就是从极之渊，又称中极之渊，深三百初，冯夷就住在那里。
《山海经》曰：南即从极之渊也，一曰中极之渊，深三百仞，惟冯夷都焉。
The "Classic of Mountains and Seas" says: To the south is the end of the abyss, also called the Central Abyss. It is 300 miles deep, and is the home of Fengyi.