Solomon
Proverbs 16:6ESV·traditional attribution

By steadfast love and faithfulness iniquity is atoned for, and by the fear of the LORD one turns away from evil.

Matthew Henry Presbyterian @wholebiblehenry

See here, 1. How the guilt of sin is taken away from us - by the mercy and truth of God, mercy in promising, truth in performing, the mercy and truth which kiss each other in Jesus Christ the Mediator - by the covenant of grace, in which mercy and truth shine so brightly - by our mercy and truth, as the condition of the...

John Gill Reformed Baptist @doctorgill

By mercy and truth iniquity is purged,.... Or "expiated" (d), and atoned for: not by the mercy and truth of men; not by alms deeds or showing mercy to the poor; nor by speaking truth and keeping promises, and doing justice between man and man; for, though these are duties to be performed, they will not atone for sin; and may be done by persons...

Jamieson-Fausset-Brown Reformed @jfbcommentary

By mercy and truth--that is, God's (Psa 85:10); He effects the atonement, or covering of sin; and the principles of true piety incline men to depart from evil; or, "mercy" and "truth" may be man's, indicative of the gracious tempers which work instrumentally in procuring pardon. purged--expiated (as in Lev 16:33; Isa 27:9, Hebrew).