Proverbs 12:17-19

Amplified Bible

¹⁷ 
He who speaks truth [when he testifies] tells what is right,
But a false witness utters deceit [in court].
¹⁸ 
There is one who speaks rashly like the thrusts of a sword,
But the tongue of the wise brings healing.
¹⁹ 
Truthful lips will be established forever,
But a lying tongue is [credited] only for a moment.