Solomon
Proverbs 27:20ESV·traditional attribution

Sheol and Abaddon are never satisfied, and never satisfied are the eyes of man.

Matthew Henry Presbyterian @wholebiblehenry

Two things are here said to be insatiable, and they are two things near of kin - death and sin. 1. Death is insatiable. The first death, the second death, both are so. The grave is not clogged with the multitude of dead bodies that are daily thrown into it, but is still an open sepulchre, and cries, Give, give.

John Gill Reformed Baptist @doctorgill

Though thou shouldest bray a fool in a mortar among wheat with a pestle,.... As the manna was, Num 11:8; and as wheat beat and bruised in a mortar, or ground in a mill, retains its own nature; so, let a wicked man be used ever so roughly or severely, by words, admonitions, reproofs, and counsels; or by deeds, by corrections and punishment, by hard...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Men's cupidity is as insatiable as the grave.