Matthew Henry's Complete Bible Commentary

Verse 9

Here is, 1. A repetition of what was said before (Proverbs 18:5), for we have need to be again and again warned of the danger of the sin of lying and false-witness-bearing, since nothing is of more fatal consequence. 2. An addition to it in one word; there it was said, He that speaks lies shall not escape, and intimated that he shall be punished. Here it is said, His punishment shall be such as will be his destruction: he shall perish; the lies he forged against others will be his own ruin. It is a damning destroying sin. MHBCC 648.8