Solomon
Proverbs 28:25ESV·traditional attribution

A greedy man stirs up strife, but the one who trusts in the LORD will be enriched.

Matthew Henry Presbyterian @wholebiblehenry

Note, 1. Those make themselves lean, and continually unquiet, that are haughty and quarrelsome, for they are opposed to those that shall be made fat: He that is of a proud heart, that is conceited of himself and looks with a contempt upon all about him, that cannot bear either competition or contradiction, he stirs up strife, makes mischief, and creates disturbance to himself and every body else. 2.

John Gill Reformed Baptist @doctorgill

He that is of a proud heart stirreth up strife,.... Or, of a "large heart" (c), or has an enlarged one; not with useful knowledge and understanding, as Solomon had; nor a heart enlarged with love and affection to the souls of men, as the Apostle Paul had; but either has a covetous one, who enlarges its desire as hell, and is never satisfied with...

Jamieson-Fausset-Brown Reformed @jfbcommentary

of a proud heart--literally, "puffed up of soul"--that is, self-confident, and hence overbearing and litigious. made fat--or, "prosperous" (Pro 11:25; Pro 16:20).