《笑林广记·古艳部》
接着他沉思片刻，带笑进到里屋写回信。 书生听了十分高兴，说： 人不可不学，只一个字用得恰当，便一家都问候到了，增添了许多喜庆。 
予曰： 俱安。 乃沉吟半晌，带笑而入，才发回书。 生大喜曰： 人不可不学，只一字用着得当，便一家俱问到，添下许多殷勤。 
Then he pondered for a moment, walked into the inner room with a smile on his face and wrote a reply. The scholar was very happy after he heard this, and said: We must study. Just one word can be used appropriately to greet the whole family and add a lot of joy.