Solomon
Proverbs 14:25ESV·traditional attribution

A truthful witness saves lives, but one who breathes out lies is deceitful.

Matthew Henry Presbyterian @wholebiblehenry

See here, 1. How much praise is due to a faithful witness: He delivers the souls of the innocent, who are falsely accused, and their good names, which are as dear to them as their lives. A man of integrity will venture the displeasure of the greatest, to bring truth to light and rescue those who are injured by falsehood.

John Gill Reformed Baptist @doctorgill

A true witness delivereth souls,.... Or, "a witness of truth" (x): one that witnesses truth upon oath in a court of judicature, he "delivers souls"; men, not one man only, but many; a whole family, or more, in danger of being ruined; he delivers them, as the Septuagint and Arabic versions add, "from evils"; from evil charges and accusations brought against them; from the oppression...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Life often depends on truth-telling. a deceitful . . . lies--He that breathes out lies is deceit, not to be trusted (Pro 14:5).