《水经注·卷三十七》
丹水又往东北流，两岸岩石上有很多老虎的脚迹，有的深，有的浅，但都是天然形成，不是人工斧凿出来的。
丹水又东北流，两岸石上有虎迹甚多，或深或浅，皆悉成就自然，咸非人工。
Danshui flows to the northeast again, and there are many tiger footprints on the rocks on both sides. Some are deep, some are shallow, but they are all natural formations, not artificially chiseled out.