Solomon
Proverbs 14:34ESV·traditional attribution

Righteousness exalts a nation, but sin is a reproach to any people.

Matthew Henry Presbyterian @wholebiblehenry

Note, 1. Justice, reigning in a nation, puts an honour upon it. A righteous administration of the government, impartial equity between man and man, public countenance given to religion, the general practice and profession of virtue, the protecting and preserving of virtuous men, charity and compassion to strangers (alms are sometimes called righteousness), these exalt a nation; they uphold the throne, elevate the people's minds...

John Gill Reformed Baptist @doctorgill

Righteousness exalteth a nation,.... Administered by the government, and exercised by subjects towards one another; doing justice between man and man: this exalts a nation, as it did the people of Israel, while practised among them; this sets a people above their neighbours, and high in the esteem of God and men; and is attended with privileges and blessings, which make a nation great and honourable.

Jamieson-Fausset-Brown Reformed @jfbcommentary

Righteousness--just principles and actions. exalteth--raises to honor. is a reproach--brings on them the ill-will of others (compare Pro 13:6).