He that speaketh truth sheweth forth righteousness: but a false witness deceit.Proverbs 12:17 Parallel Commentaries

Of Having Confidence in God when Evil Words are Cast at Us
"My Son, stand fast and believe in Me. For what are words but words? They fly through the air, but they bruise no stone. If thou are guilty, think how thou wouldst gladly amend thyself; if thou knowest nothing against thyself, consider that thou wilt gladly bear this for God's sake. It is little enough that thou sometimes hast to bear hard words, for thou art not yet able to bear hard blows. And wherefore do such trivial matters go to thine heart, except that thou art yet carnal, and regardest …
Thomas A Kempis—Imitation of Christ

The Ninth Commandment
Thou shalt not bear false witness against thy neighbour.' Exod 20: 16. THE tongue which at first was made to be an organ of God's praise, is now become an instrument of unrighteousness. This commandment binds the tongue to its good behaviour. God has set two natural fences to keep in the tongue, the teeth and lips; and this commandment is a third fence set about it, that it should not break forth into evil. It has a prohibitory and a mandatory part: the first is set down in plain words, the other …
Thomas Watson—The Ten Commandments