Proverbs 21:15

“[It is] joy to the, last to do judgment, etc.] It is with pleasure he does it; he delights in the law of God, after the inward man, and finds much peace of mind and joy in the Holy Ghost in keeping it, and observing its commands, which are holy, just, and good; yea, it gives him pleasure to see justice done by others; both by private persons in their dealings with one another; and especially by judges putting the laws in execution, as their office requires; whereby much good comes to a nation in general, and to particular persons; but destruction [shall be] to the workers of iniquity; that make a trade of sinning; whose whole life is a continued series of sin and iniquity; who take much…”

“But the just love right and need no bribes. The wicked at last meet destruction, though for a time happy in concealing corruption.”

“21:15 God is just, so he will reward the innocent and punish the wicked. No wonder the godly love justice while the wicked fear it.”

“joy: Job 29:12-17; Psa 40:8, Psa 112:1, Psa 119:16, Psa 119:92; Ecc 3:12; Isa 64:5; Joh 4:34; Rom 7:22 destruction: Pro 21:12, Pro 5:20, Pro 10:29; Mat 7:23, Mat 13:41, Mat 13:42; Luk 13:27, Luk 13:28 Proverbs 21:16”

“15 It is a joy to the just to do justice, And a terror for them that work iniquity. To act according to the law of rectitude is to these as unto death; injustice has become to them a second nature, so that their heart strives against rectitude of conduct; it also enters to little into their plan of life, and their economy, that they are afraid of ruining themselves thereby. So we believe, with Hitzig, Elster, Zckler, and Luther, this must be explained in accordance with our interpretation of Pro 10:29. Fleischer and others supplement the second parallel member from the first: וּפעל און מחתּה לפעלי אין; others render 15b as an independent sentence: ruin falls on those who act wickedly. But…”