《太平广记·卷一百九十四·豪侠二》
这时，崔生一回头，看见那姬女伸出三个手指，又连续翻了三掌，然后又指了指胸前的小镜子，说：记住。
时生回顾，妓立三指，又反三掌者，然后指胸前小镜子云：记取。
At this moment, Cui Sheng turned his head back and saw that the young girl stretched out three fingers, then consecutively turned her palms over three times and then pointed at the small mirror on her chest, saying, "Remember this."