《太平广记·卷四百一十七·草木十》
他因为心里留连不舍，千方百计地留她，到底不可，只好把平常带在身上的一件宝贝一一白玉指环，送给她说： 希望你见到它就能赶快回来。 
客因留连，百端遍尽，而终不可。素宝白玉指环，因以遗之曰： 幸视此，可以速还。 
Because he was reluctant to part with her, he tried every means to keep her, but he could not. He had to give her a treasure that he always carried with him - a white jade finger ring - and said: "I hope you can come back as soon as you see it."