《论衡·卷十七·是应篇》
根据《尔雅》上的解释，对实物进行验证，考察味道甘甜的露水降下附着在树木上，察看甘露附着过的树木，并不比不附着甘露的树木更茂盛。
缘《尔雅》之言，验之於物，案味甘之露下着树木，察所着之树，不能茂於所不着之木。
According to the explanation in the Erh-ya, when we examine the facts and see whether the dew which tastes sweet falls on trees, and then examine the trees which the dew has fallen on, we find that they do not flourish any more than those on which the dew has not fallen.