“A false witness will not go unpunished”: For “A false witness” see 6.19. “Will not go unpunished”, as in 6.29, means “he will not be acquitted in court” or “he will surely be punished.” See Good News Translation.

“And he who utters lies will not escape”: This line has essentially the same meaning as the previous line. “Utters lies” is literally “breathes lies.” The negative “will not escape” is parallel with “will not go unpunished” in line 1, and may need to be expressed, for example, “will not go free,” “will not be released,” or positively “will be condemned.” Contemporary English Version combines “will not go unpunished” and “will not escape” by saying “Dishonest witnesses and liars won’t escape punishment.”

Quoted with permission from Reyburn, William D. and Fry, Euan McG. A Handbook on Proverbs. (UBS Helps for Translators). New York: UBS, 2000. For this and other handbooks for translators see here .