《太平广记·卷一百九十四·豪侠二》
一个多月后，对刘昌裔说：魏帅不知我们在这住下了，必定派人来，今天请你剪些头发，用红绸布包上，送到魏帅枕前，表示我们不回去了。
后月余，白刘曰：彼未知住，必使人继至。今宵请剪发，系之以红绡，送于魏帅枕前，以表不回。
More than a month later, Liu Changyi said: General Wei did not know that we lived here, and he must send someone to come. Today I ask you to cut some hair, wrap it in red silk, and send it to General Wei's pillow to indicate that we will not come back.