Proverbs 12:17 in the World English Bible
He who is truthful testifies honestly, but a false witness lies.
Context
16 A fool’s wrath is presently known: but a prudent man covereth shame.
17 He that speaketh truth sheweth forth righteousness: but a false witness deceit.
18 There is that speaketh like the piercings of a sword: but the tongue of the wise is health.