《宋书·志·卷二十一》
白兔直身而跪来捣成虾蟆丸，放在玉盘中献给皇上，吃了这药就可以成仙。
白兔长跪捣药虾蟆丸，奉上陛下一玉柈，服此药可得即仙。
The White hare stands up to knead it into pills of toad, which is presented to the emperor on a jade plate that makes one immortal.