《论衡·卷二十·须颂篇》
因为君王称颂了臣子，所以臣子应当颂扬君父的功德，这在道理上是很清楚不过的。
夫以人主颂称臣子，臣子当褒君父，於义较矣。
Because the sovereign praised the minister, the minister should praise the sovereign's virtues, which is very clear in terms of reason.