Solomon
Proverbs 26:2ESV·traditional attribution

Like a sparrow in its flitting, like a swallow in its flying, a curse that is causeless does not alight.

Matthew Henry Presbyterian @wholebiblehenry

Here is, 1. The folly of passion. It makes men scatter causeless curses, wishing ill to others upon presumption that they are bad and have done ill, when either they mistake the person or misunderstand the fact, or they call evil good and good evil. Give honour to a fool, and he thunders out his anathemas against all that he is disgusted with, right or wrong.

John Gill Reformed Baptist @doctorgill

As the bird by wandering, as the swallow by flying,.... As a bird, particularly the sparrow, as the word (h) is sometimes rendered, leaves its nest and wanders from it; and flies here and there, and settles nowhere; and as the swallow flies to the place from whence it came; or the wild pigeon, as some (i) think is meant, which flies away very swiftly...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Though not obvious to us, the bird--literally, "sparrow"--and swallow--have an object in their motions, so penal evil falls on none without a reason.