《徐霞客游记·楚游日记十四》
碑文说苏仙的母亲是便县人，有二天在溪中洗灌东西，一团青苔在她钓脚上缠绕了三四圈，于是有所感应而怀孕，在汉惠帝五年五月十五日生下苏仙，•她母亲将他丢在如今乳源宫后面的石洞中，第二天前去看时，却见白鹤用翅膀遮盖着他，白鹿给他哺乳，觉得奇异，便把他抱回家。
言仙之母便县人，便即今永兴。有浣于溪，有苔成团绕足者再四，感而成孕，生仙于汉惠帝五年即公元前年五月十五。母弃之后洞中，即白鹿洞。明日往视，则白鹤覆之，白鹿乳之，异而收归。
The epitaph states that Su Xian's mother was from Bian County. One day, she was washing clothes in the stream when a ball of green moss wrapped around her feet three or four times. Then she felt a sensation and became pregnant, giving birth to Su Xian on May 15 of the 5th year of Emperor Hui of Han. His mother left him in a cave behind the current Ruyuanguan, but when she went to see him the next day, she saw that white cranes were covering him with their wings and white deer were breastfeeding him. She found it strange, so she took him home.