Proverbs 12:10-18

A righteous man regardeth the life of his beast: but the tender mercies of the wicked are cruel. He that tilleth his land shall be satisfied with bread: but he that followeth vain persons is void of understanding. The wicked desireth the net of evil men: but the root of the righteous yieldeth fruit. The wicked is snared by the transgression of his lips: but the just shall come out of trouble. A man shall be satisfied with good by the fruit of his mouth: and the recompence of a man's hands shall be rendered unto him. The way of a fool is right in his own eyes: but he that hearkeneth unto counsel is wise. A fool's wrath is presently known: but a prudent man covereth shame. He that speaketh truth sheweth forth righteousness: but a false witness deceit. There is that speaketh like the piercings of a sword: but the tongue of the wise is health.

David gives one of the best comments upon the words, that are like the piercings of the sword. Psalms 141:5. And the apostle shews wherefore it is so. Hebrews 4:12.