Solomon
Proverbs 19:28ESV·traditional attribution

A worthless witness mocks at justice, and the mouth of the wicked devours iniquity.

Matthew Henry Presbyterian @wholebiblehenry

Here is a description of the worst of sinners, whose hearts are fully set in them to do evil. 1. They set that at defiance which would deter and detain them from sin: An ungodly witness is one that bears false witness against his neighbour, and will forswear himself to do another a mischief, in which there is not only great injustice, but great impiety...

John Gill Reformed Baptist @doctorgill

An ungodly witness scorneth judgment,.... Or, "a witness of Belial" (z). A false witness is not awed by the place of judgment where he is; nor by the judge before whom he is; nor by the law, the rule of judgment, nor by the punishment of perjury; he scorns all these, and scoffs at them, and proceeds in bearing a false testimony: or he covers...

Jamieson-Fausset-Brown Reformed @jfbcommentary

ungodly witness--(Compare Margin), one false by bad principles (compare Pro 6:12). scorneth judgment--sets at naught the dictates of justice. devoureth--literally, "swalloweth," as something delightful.