《水经注·卷二十》
楚水在这里注入。楚水发源于上洛县西南面的楚山，昔日四皓隐居在楚山，就是这座山。
楚水注之，水源出上洛县西南楚山。昔四皓隐于楚山，即此山也。
Chu River joins here. Chu River originates from Chu Mountain in the southwest of Shangluo County, and the place where the four learned men lived in seclusion in ancient times was this very mountain.