《太平广记·卷三百八十四·再生十》
临分手时，刘溉说， 我赠你一首诗吧： 冥路杳杳人不知，不用苦说使人悲。
别谓窦曰： 我有诗赠君，曰： 冥路杳杳人不知，不用苦说使人悲。
When they were about to part, Liu Gai said, “Let me give you a poem: The Road to the Netherworld is Long and Unknown, No Need to Tell of It For It Will Only Make People Cry. I’m Glad to Have Met You, for You Can Give My Family a Message, But When and Where We Shall Meet Again is Uncertain!”