《太平广记·卷四十一·神仙四十一》
过了几天，忽然看见一面岩石下面，长了几百株松树，松林中有六个道士，象炼制药材的样子。
数日，忽见一岩下，长松数百株，中有道士六人，如修药之状。
After a few days, they suddenly saw hundreds of pine trees growing under a rock face, and six Taoist priests in the pine forest, who seemed to be refining medicinal herbs.