《太平广记·卷四十七·神仙四十七》
这洞有三个门：一个一直西通昆仑山，一个出口在这岩石下面，一个是向来风穴，来风穴是洞的正门，各门都有龙蛇把守。
洞有三门，一径西通昆仑，一径出此岩之下，一向来风穴，是洞之端门也。皆有龙蛇守之。
This cave has three doors: one leads directly west to Mount Kunlun, one exits under the rock, and one is a wind hole in front of the cave. Each door is guarded by dragons and snakes.