《水经注·卷十三》
又往东南流出山间，漯水又南流出山，瀑布从高崖飞流直下，注入深壑，轰鸣的急流下泻十几丈，称为落马洪，也和孟门这样的险流差不多。
又东南出山，漯水又南出山，瀑布飞梁，悬河注壑，漰湍十许丈，谓之落马洪，抑亦孟门之流也。
It proceeds south-east and flows out of the mountains; the Luo River also flows out of the mountains southwards; the waterfall rushes down the cliff and into the deep ravine; the roaring rapids rush down a dozen zhang, and are known as the Luoma Hong, which is similar to the turbulent flow at Mengmen.