Curse not the king, no not even in your thought; and curse not the rich in your bedchamber: for a bird of the air shall carry the voice, and that which has wings shall tell the matter.
All Commentaries on Ecclesiastes 10:20 Go To Ecclesiastes 10
George Leo Haydock
Said. Pigeons are taught to carry letters in the east, and Solomon alludes to this custom, or he makes use of this hyperbole to shew, that kings will discover the most secret inclinations by means of spies. We must not speak ill even of those who are worthy of blame, ver. 16. (Calmet)