Solomon
Proverbs 24:16ESV·traditional attribution

for the righteous falls seven times and rises again, but the wicked stumble in times of calamity.

Matthew Henry Presbyterian @wholebiblehenry

This is spoken, not so much by way of counsel to wicked men (they will not receive instruction, Pro 23:9), but rather in defiance of them, for the encouragement of good people that are threatened by them. See here, 1. The designs of the wicked against the righteous, and the success they promise themselves in those designs.

Commenting on Proverbs 24:15-16

John Gill Reformed Baptist @doctorgill

Rejoice not when thine enemy falleth,.... These words are spoken not to the wicked man, Pro 24:15; but to the just man, or Solomon's son, or the children of Wisdom; for by the "enemy" is meant such who are at enmity with the people of God, as the seed of the serpent, and those after the flesh, are: and when these "fall", saints should not...

Jamieson-Fausset-Brown Reformed @jfbcommentary

seven times--often, or many (Pro 6:16, Pro 6:31; Pro 9:1).