《太平广记·卷十一·神仙十一》
刘凭又施了道术，那树在盛夏时就干枯而死，有一条七八丈长的大蛇挂在树上死去，后来这棵树再也不害人了。
凭乃敕之，盛夏树便枯死，有大蛇长七八丈，悬其间而死，后不复为患。
Liu Ping cast another spell, and the tree withered and died at the height of summer. A giant snake, seven or eight meters long, hung dead in the tree. After the incident, the tree no longer harmed anyone.