John Gills Exposition of the Bible Commentary - Proverbs 12:17
He that speaketh truth showeth forth righteousness ,.... He that "blows" or "breathes out truth" F4 יפיח "effiat", Junius & Tremellius; "spirat", Schultens. , as the word signifies; that utters it freely and fully without any hesitation; that speaks nothing but truth, and speaks out the whole truth without any reserve; such a man upon every occasion will declare that which is just and right, and show himself to be an honest and upright man; he that uses himself to speak truth... read more
Matthew Henry's Complete Commentary - Proverbs 12:17
Here is, 1. A faithful witness commended for an honest man. He that makes conscience of speaking truth, and representing every thing fairly, to the best of his knowledge, whether in judgment or in common conversation, whether he be upon his oath or no, he shows forth righteousness; he makes it to appear that he is governed and actuated by the principles and laws of righteousness, and he promotes justice by doing honour to it and serving the administration of it. 2. A false witness condemned... read more