Here we have, I. David's good prayers, by which he sought to God for mercy; these he mentions here, not as boasting of them, or trusting to any merit in them, but reflecting upon them with comfort, that he had taken the appointed way to comfort. Observe here, 1. That he was inward with God in prayer; he prayed with his heart, and prayer is acceptable no further than the heart goes along with it. Lip-labour, if that be all, is lost labour. 2. He was importunate with God in prayer; he cried, as one in earnest, with fervour of affection and a holy vehemence and vigour of desire. He cried with his whole heart; all the powers of his soul were not only engaged and employed, but exerted to the utmost, in his prayers. Then we are likely to speed when we thus strive and wrestle in prayer. 3. That he directed his prayer to God: I cried unto thee. Whither should the child go but to his father when any thing ails him? 4. That the great thing he prayed for was salvation: Save me. A short prayer (for we mistake if we think we shall be heard for our much speaking), but a comprehensive prayer: "Not only rescue me from ruin, but make me happy." We need desire no more than God's salvation (Psa 50:23) and the things that accompany it, Heb 6:9. 5. That he was earnest for an answer; and not only looked up in his prayers, but looked up after them, to see what became of them (Psa 5:3): "Lord, hear me, and let me know that thou hearest me."
II. David's good purposes, by which he bound himself to duty when he was in the pursuit of mercy. "I will keep thy statutes; I am resolved that by thy grace I will;" for, if we turn away our ear from hearing the law, we cannot expect an answer of peace to our prayers, Pro 28:9. This purpose is used as a humble plea (Psa 119:146): "Save me from my sins, my corruptions, my temptations, all the hindrances that lie in my way, that I may keep thy testimonies." We must cry for salvation, not that we may have the ease and comfort of it, but that we may have an opportunity of serving God the more cheerfully.

They draw nigh that follow after mischief,.... Or "evil" (c); that which is sinful in itself, and injurious to others. Some cannot sleep unless they do mischief; they are bent upon it, and proceed from evil to evil: they are eager in their pursuit of it, as the huntsman after his sport, to which the allusion is; though it is to their ruin, even to their death, Pro 11:19; These the psalmist says "draw nigh"; not unto God, unless feignedly and with their mouths only; but to him they drew nigh, to David, in an hostile way they pursued after him, in order to take away his life, and they had very nearly overtaken him, and were just ready to seize him; his life drew nigh to those destroyers, and those destroyers drew nigh to that, so that he was in great danger; and the more as these were abandoned creatures, that neither feared God nor regarded man, as follows:

they are far from thy law; from the knowledge of it, of its equity and purity; and especially of its spirituality, and of its power and influence upon their minds; and so far from subjection and obedience to it; so far from it, that they treat it with the utmost contempt, cast it away from them and despise it, Rom 8:7.

(c) "iniquitati", V. L. "scelus", Tigurine version; so Junius & Tremellius, Piscator, Michaelis.