《笑林广记·世讳部》
雷公要击不孝子，这个不孝子拉住雷公的手说： 你且慢击，我先问你一下，你是新雷公还是老雷公？ 
雷公欲诛忤逆子，子执其手曰： 且慢击。我且问你，是新雷公，还是旧雷公？ 
The Lord of Thunder was about to strike an unfilial son, when this unfilial son grabbed the Lord of Thunder's hand and said: Wait a moment before you strike me. Let me ask you this first, are you the new Lord of Thunder or the old Lord of Thunder?