《搜神后记·卷八》
现在新淦县北面二十里有个地方，名叫封溪，那里是聂友砍伐梓树切割成木板放进池塘的所在地，那棵梓树，现在还在，就因为被聂友从前砍伐过，那梓树的枝叶都向下生长。
今新淦北二十里余，曰封溪，有聂友截梓树板，涛牂柯处。有梓树，今犹存。乃聂友向日所截，枝叶皆向下生。
Now, 20 miles north of Xinjian County, there is a place called Fengxi, which is where Nie You cut down the catalpa tree and cut it into planks and put it into the pond. That catalpa tree is still there. Because Nie You cut it down before, the branches and leaves of the catalpa tree all grow downwards.