《明史·列传·卷一百二十七》
张臣夜晚挖开汉、唐二个水渠，水淹道路不通，又在赤木口摆上阵势，俺答于是从山后离开了。
臣夜决汉、唐二渠水，道不通，复陈兵赤水口，俺答乃从山后去。
At night, Zhang dug up two water channels built in the Han and Tang dynasties, flooding the roads and cutting off access, and then he arranged an ambush at Chimukou. Ordos retreated into the mountains.