Proverbs 26:2 - Albert Barnes' Notes on the Bible

i. e., “Vague as the flight of the sparrow, aimless as the wheelings of the swallow, is the causeless curse. It will never reach its goal.” The marginal reading in the Hebrew, however, gives” to him” instead of “not” or “never;” i. e., “The causeless curse, though it may pass out of our ken, like a bird’s track in the air, will come on the man who utters it.” Compare the English proverb, “Curses, like young chickens, always come home to roost.”