Psalms 37:14,15 - Joseph Benson’s Commentary on the Old and New Testaments

The wicked have drawn out the sword, &c. They are furnished with all sorts of arms, and are ready to give the deadly blow. To slay such as be of upright conversation Those against whom they have no quarrel, for any injury they have done them; but only for their integrity and righteousness, or because they are better than themselves, and will not comply with their wicked counsels and courses. Their sword shall enter into their own heart God will not only defend the upright from their mischievous designs, but will make those designs to fall upon their own heads. “I cannot but think,” says a writer quoted here by Dr. Dodd, “that David understood by these weapons, with which he has furnished the ungodly, their bitter and malicious invectives, their false and foul reproaches, &c. These were the arms, in the use of which, as he frequently complains, they were admirably well skilled.” Thus, (Psalms 57:4,) speaking of wicked men, he says, Whose teeth are spears and arrows, and their tongue a sharp sword. And if so, then Psalms 37:15 “will mean that their intention will be frustrated; they shall not do the mischief they intended; their bows shall be broken And their invectives and calumnies shall recoil and do themselves hurt; their sharp sword, their false and malicious tongues, shall pierce through their own soul. And that this was the psalmist's meaning, who can doubt, after reading Psalms 64:3, where the wicked doers are said to have whet their tongue like a sword, and to shoot out their arrows, even bitter words.”