Yang Zhu had a younger brother named Yang Bu.

One day Yang Bu went out wearing white clothes. It happened to rain, so he took off his white clothes and changed into black clothes and went home. He dog did not know that he had changed clothes, so it came at him barking.

Yang Bu got angry and was about to beat the dog. At this time Yang Zhu said to him. "Don't beat it. You may also make this kind of mistake too. If your dog went out in white, and came back in black, wouldn't you be surprised?"

杨朱有个弟弟叫杨布，穿着白色的衣服出门。

恰好遇上天下雨，他就脱掉白衣穿上黑衣服回家。他的狗不知道是他换了衣服，汪汪叫着扑过来。

杨布怒气冲冲地就要打这条狗，杨朱对他说：“你别打它啦，你也可能犯它这种错误。要是你的狗出去时是白色，回来时却变成了黑色，你会不觉得奇怪吗？”