《水经注·卷二十五》
洙水发源于泰山郡盖县的临乐山，《地理志》说：临乐山是洙水的发源地，洙水往西北流到盖，注入泗水，有人把洒字写作池字，把字写错了。洙水从山间往西北流经盖县，汉景帝中元五年冬，修筑平阳城。
汉景帝中五年，封后兄王信为侯国。又西径泰山东平阳县。《春秋》宣公八年冬，城平阳。
The Shu River flows from Lin Yue Mountain in Juxian County, Tai Shan prefecture. The Comprehensive Records of Geography say, Lin Yue Mountain is the source of the Shu River. The Shu river flows northwest to Gai, and empties into the Si River; the character Shu is often written as Chi, which is incorrect. The Shu River flows northwest from the mountains past Juxian County, in the winter of the fifth year of Emperor Jing of Han, the city of Pingyang was built.