《明史·列传·卷二十九》
齐泰骑上用墨涂黑的白马逃走，马跑了一段远路后，汗出墨退。
泰墨白马走，行稍远，汗出墨脱。
Qi Tai escaped on horseback, painting his white horse with ink. After the horse had travelled a certain distance, the ink dissolved in the sweat.