《太平广记·卷一百·释证二》
不一会儿，当官儿的来了。对他们三人说： 要用两个典吏，从你们三人里面挑。 
俄官至，谓三人曰： 要使典二人，三人内办之。 
After a while, the official came and said to the three of them: We need to use two official clerks. We will choose from the three of you.