《水经注·卷十七》
躺在树下的人把听到的话报告文公，文公就叫伐木人都穿上红衣，一边砍，一边拿灰围上，树就被砍断了，变成一条牛跳到水里去，所以秦给树神立祠。
答曰：其如我何？又曰：赤灰跋于子何如？乃默无言，卧者以告。令士皆赤衣，随所所以灰跋，树断，化为牛入水，故秦为立祠。
Lying under the tree people heard words report to the duke of Qin, Qin duke called people wear red clothes, logging while chopping, while the ash around, trees were cut off, turned into a cow jumping into the water, so Qin characters for the God of trees temple.