Here, I. David prays against the instruments of his troubles, that God would make haste to execute judgment on those that persecuted him. He prays not for power to avenge himself (he bore no malice to any), but that God would take to himself the vengeance that belonged to him, and would repay (Rom 12:19), as the God that sits in the throne judging right. There is a day coming, and a great and terrible day it will be, when God will execute judgment on all the proud persecutors of his people, tribulation to those that troubled them; Enoch foretold it (Jde 1:14), whose prophecy perhaps David here had an eye to; and that day we are to look for and pray for the hastening of. Come, Lord Jesus, come quickly. 2. He pleads the long continuance of his trouble: "How many are the days of thy servant? The days of my life are but few" (so some); "therefore let them not all be miserable, and therefore make haste to appear for me against my enemies, before I go hence and shall be seen no more." Or rather, "The days of my affliction are many; thou seest, Lord, how many they be; when wilt thou return in mercy to me? Sometimes, for the elect's sake, the days of trouble are shortened. O let the days of my trouble be shortened; I am thy servant; and therefore, as the eyes of a servant are to the hand of his master, so are mine to thee, until thou have mercy on me."

Quicken me after thy lovingkindness,.... According to it, and with it; let me have some discoveries of it, and of interest in it; and that will quicken me, revive and comfort me, under all the reproaches, ill usage, and persecutions of men. The love of God shed abroad in the heart comforts and supports under all sorts of afflictions; it quickens the graces of the Spirit, and brings them forth into lively exercise, as faith, hope, and love; and to a diligent and fervent discharge of every duty: it constrains to love the Lord, and live to him, to his glory, in obedience to his will;

so shall I keep the testimony of thy mouth; the word of God, which comes out of his mouth, testifies of him, and of his mind and will; and which is to be received and observed, as being greater than the testimony of men, Jo1 5:9.