《太平广记·卷四十七·神仙四十七》
许栖岩进四川，登上入蜀栈道的时候，不小心，许栖岩和马都摔到悬崖下面去了，由于有多年积累的落叶承受他们，很幸运没有受到损害。
洎登蜀道危栈，栖岩与马，俱坠崖下，积叶承之，幸无所损。
When Xu Qixiyan entered Sichuan and climbed the Shu Road, he accidentally fell down the cliff with his horse. Fortunately, they were supported by the fallen leaves that had accumulated over many years, and they were not harmed.