《墨子·47章 贵义》
过去商汤去见伊尹，叫彭氏的儿子给自己驾车。彭氏之子半路上问商汤说： 您要到哪儿去呢？ 
昔者汤将往见伊尹，令彭氏之子御，彭氏之子半道而问曰： 君将何之？ 
In the past, Shang Tang went to see Yi Yin, and a son of Peng drove for him. The son of Peng asked Shang Tang midway: Where are you going?