Matthew Poole and continuators on Proverbs 19:9

9 A false witness shall not be unpunished, and he that speaketh lies shall perish .

This was said before, v. 5. and seems to be here repeated, either for its great use and weight in humane society, and to shew how much God abhors such practices; or to shew the pernicious effects of this sin, and consequently of all other sins, one eminent kind being put for all the rest, and this in opposition to the good effects of Wisdom or Piety, which he declared in the foregoing verse.