《太平广记·卷四百七十二·水族九》
有时雌蛇来了，于是就互相地打斗撕咬起来，力气小的蛇便死亡了，采龟尿的时候，把雄龟拿过来放在瓷碗和小盘中，在龟的后面，用镜子照着龟，看见镜子里的龟之后，就会淫性发作因而流出尿来。
或雌蛇至，有相趁斗噬，力小致毙者。采时，取雄龟置瓷碗及小盘中，于龟后，以镜照之，既见镜中龟，即淫发而失溺。
Sometimes, when a female snake comes, they will fight and bite each other, and the weaker snake will die. When collecting turtle urine, pick up a male turtle and put it in a porcelain bowl or a small plate. Behind the turtle, shine a mirror at the turtle. When it sees the turtle in the mirror, it will be sexually aroused and thus urinate.