Proverbs 12:17-20

He who speaks truth [when he testifies] tells what is right, But a false witness utters deceit [in court]. There is one who speaks rashly like the thrusts of a sword, But the tongue of the wise brings healing. Truthful lips will be established forever, But a lying tongue is [credited] only for a moment. Deceit is in the heart of those who devise evil, But counselors of peace have joy.