| Gill's Exposition of the Entire Bible A false witness shall not be unpunished,.... See Gill on Proverbs 19:5; and he that speaketh lies shall perish; or "be lost", shall be undone for ever; he shall not enter into the holy city, but have his part in the lake of fire: they that speak lies in hypocrisy, doctrinal ones, and are given up to believe and profess them, such shall be damned, 2 Thessalonians 2:11.
Keil and Delitzsch Biblical Commentary on the Old TestamentThe group of proverbs (Proverbs 19:9-16) now following begins and closes in the same way as the preceding. 9 A lying witness doth not remain unpunished, And one who breathes out lies perisheth, or goeth to ruin, for אבד (R. בד, to divide, separate) signifies to lose oneself in the place of the separated, the dead (Arab. in the infinite). In Proverbs 19:5, instead of this ἀπολεῖται (lxx), the negative οὐ σωθήσεται is used, or as the lxx there more accurately renders it, οὐ διαφεύξεται.
Geneva Study BibleA false witness shall not be unpunished, and he that speaketh lies shall perish.
Matthew Henry's Concise Commentary19:3. Men run into troubles by their own folly, and then fret at the appointments of God. 4. Here we may see how strong is men's love of money. 5. Those that tell lies in discourse, are in a fair way to be guilty of bearing false-witness. 6. We are without excuse if we do not love God with all our hearts. His gifts to us are past number, and all the gifts of men to us are fruits of his bounty. 7. Christ was left by all his disciples; but the Father was with him. It encourages our faith that he had so large an experience of the sorrows of poverty. 8. Those only love their souls aright that get true wisdom. 9. Lying is a damning, destroying sin. 10. A man that has not wisdom and grace, has no right or title to true joy. It is very unseemly for one who is a servant to sin, to oppress God's free-men. | 
