Proverbs 12:17

15 The way of a fool is right in his own eyes: but he that hearkeneth unto counsel is wise.

16 A fool’s wrath is presently known: but a prudent man covereth shame.

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.

19 The lip of truth shall be established for ever: but a lying tongue is but for a moment.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
He who speaks the truth declares what is right, but a false witness speaks deceit.
KJV
He that speaketh truth sheweth forth righteousness: but a false witness deceit.
WEB
He who is truthful testifies honestly, but a false witness lies.
ASV
He that uttereth truth showeth forth righteousness; But a false witness, deceit.
DARBY
He that uttereth truth sheweth forth righteousness; but a false witness deceit.
BLB
The one breathing forth truth declares righteousness, and a witness of falsehoods, deceit.
ÅB
Den som er ærlig i sine ord, taler sannhet, men et falskt vitne taler svik.
OTB
Et ærlig vitne taler sannferdig, men et falskt vitne taler svik.
B1930
Den som er ærlig i sine ord, taler sannhet, men et falskt vidne taler svik.

Study notes (Tyndale)

Original text and word study

Cross references