《笑林广记·术业部》
一天傍晚，一个人拿了二钱碎银来熔铸，银匠偷偷地留下一半，只用一钱熔铸后交给那人。
至暮有以碎银二钱来倾者，乃落其半，倾作对充与之。
One evening, a man came with two ounces of silver to be melted down. The silversmith secretly kept half of it and only used one ounce to melt it down before giving it to the man.