《孔子家语·颜回》
现在东野毕驾车，让马驾上车拉紧缰绳，上好马嚼子；时而慢跑时而快跑，步法已经调理完成；经历险峻之地和长途奔跑，马的力气已经耗尽，然而还让马不停地奔跑。
今东野毕之御也，升马执辔，衘体正矣；步骤驰骋，朝礼毕矣；历险致远，马力尽矣；然而犹乃求马不已。
"But now, Dongye Bi makes the horses pull the carriage, puts a tight rein on them, and fits them with a harsh bit. He makes them trot and gallop, trains them until they are completely broken in, and then drives them over rough terrain and for long distances, until they are utterly exhausted. And yet he keeps them running non-stop."