《笑林广记·古艳部》
主人说： 家里没有奴仆，凡是打扫庭院，开门关门，有劳先生做，可以吗？ 答： 行。 
主人曰： 家无臧获，凡洒扫庭除，启闭门户，劳先生为之，可乎？ 
The host said, "We don't have servants. We often ask you to do things like clean the yard, open and close the door. Is that okay?" He answered, "Yes."