Solomon
Proverbs 17:12BSB·traditional attribution

It is better to meet a bear robbed of her cubs than a fool in his folly.

Geneva Bible Notes Reformed

Let a bear robbed of her whelps meet a man, rather than a fool in his folly. (f) By which he means the wicked in his rage, who has no fear of God.

Jamieson-Fausset-Brown Reformed

They are less rational in anger than wild beasts.

Matthew Henry Presbyterian

Note, 1. A passionate man is a brutish man. However at other times he may have some wisdom, take him in his passion ungoverned, and he is a fool in his folly; those are fools in whose bosom anger rests and in whose countenance anger rages.