| Barnes' Notes on the Bible Mine eyes prevent the night watches - Luther renders this, "I wake up early." The Hebrew word means a "watch" - a part of the night, so called from military watches, or a dividing of the night to "keep guard." See the notes at Psalm 90:4. The idea of the psalmist here is, that he anticipated these regular divisions of the night in order that he might engage in devotion. Instead of waiting for their return, he arose for prayer before they recurred - so much did his heart delight in the service of God. The language would seem to be that of one who was accustomed to pray in these successive "watches" of the night - the early, the middle, and the dawn. This may illustrate what occurs in the life of all who love God. They will have regular seasons of devotion, but they will often anticipate those seasons. They will be in a state of mind which prompts them to pray; when nothing will meet their state of mind but prayer; and when they cannot wait for the regular and ordinary season of devotion - like a hungry man who cannot wait for the usual and regular hour of his meals. The meaning of the phrase, "mine eyes prevent," is that he awoke before the usual time for devotion. That I might meditate in thy word - See the notes at Psalm 1:2.
Clarke's Commentary on the BibleMine eyes prevent - קדמו kiddemu, "go before the watches." Before the watchman proclaims the hour, I am awake, meditating on thy words. The Jews divided the night into three watches, which began at what we call six o'clock in the evening, and consisted each of four hours. The Romans taught them afterwards to divide it into four watches of three hours each; and to divide the day and night into twelve hours each; wherein different guards of soldiers were appointed to watch. At the proclaiming of each watch the psalmist appears to have risen and performed some act of devotion. For a remarkable custom of our Saxon ancestors, see the note on Psalm 119:164 (note).
Gill's Exposition of the Entire BibleMine eyes prevent the night watches,.... The Targum is, "the morning and evening watches.'' There were three of them; Kimchi interprets it of the second and third; the meaning is, that the psalmist was awake and employed in one religious exercise or another, praying, reading, or meditating; either before the watches were set, or however before the time that some of them took place, or at least before they were all over; that I might meditate in thy word; he rose so early, in order to give himself up to meditation on the word of God; that he might be better instructed in the knowledge of divine things; that he might have solace and comfort from thence under his afflictions; and that he might be better furnished for the work of prayer; for the more familiar the word of God is to us, the better able we are to speak to God in his own language.
Geneva Study BibleMine eyes {b} prevent the night watches, that I might meditate in thy word. (b) He was more earnest in the study of God's word, than they who kept the watch were in their charge.
Wesley's Notes 119:148 Watches - The middle watch, which was set in the middle of the night; and the morning watch, which was set some hours before the dawning of the day.
Matthew Henry's Concise Commentary119:145-152 Supplications with the whole heart are presented only by those who desire God's salvation, and who love his commandments. Whither should the child go but to his father? Save me from my sins, my corruptions, my temptations, all the hinderances in my way, that I may keep thy testimonies. Christians who enjoy health, should not suffer the early hours of the morning to glide away unimproved. Hope in God's word encourages us to continue in prayer. It is better to take time from sleep, than not to find time for prayer. We have access to God at all hours; and if our first thoughts in the morning are of God, they will help to keep us in his fear all the day long. Make me lively and cheerful. God knows what we need and what is good for us, and will quicken us. If we are employed in God's service, we need not fear those who try to set themselves as far as they can out of the reach of the convictions and commands of his law. When trouble is near, God is near. He is never far to seek. All his commandments are truth. And God's promises will be performed. All that ever trusted in God have found him faithful.
Matthew Henry's Whole Bible CommentaryVerses 147-148 David goes on here to relate how he had abounded in the duty of prayer, much to his comfort and advantage: he cried unto God, that is, offered up to him his pious and devout affections with all seriousness. Observe, I. The handmaids of his devotion. The two great exercises that attended his prayers, and were helpful to them, were, 1. Hope in God's word, which encouraged him to continue instant in prayer, though the answer did not come immediately: "I cried, and hoped that at last I should speed, because the vision is for an appointed time, and at the end it will speak and not lie. I hoped in thy word, which I knew would not fail me." 2. Meditation in God's word. The more intimately we converse with the word of God, and the more we dwell upon it in our thoughts, the better able we shall be to speak to God in his own language and the better we shall know what to pray for as we ought. Reading the word will not serve, but we must meditate in it. II. The hours of his devotion. He anticipated the dawning of the morning, nay, and the night-watches. See here, 1. That David was an early riser, which perhaps contributed to his eminency. He was none of those that say, Yet a little sleep. 2. That he began the day with God. The first thing he did in the morning, before he admitted any business, was to pray, when his mind was most fresh and in the best frame. If our first thoughts in the morning be of God they will help to keep us in his fear all the day long. 3. That his mind was so full of God, and the cares and delights of his religion, that a little sleep served his turn. Even in the night-watches, when he awaked from his first sleep, he would rather meditate and pray than turn himself and go to sleep again. He esteemed the words of God's mouth more than his necessary repose, which we can as ill spare as our food, Job 23:12. 4. That he would redeem time for religious exercises. He was full of business all day, but that will excuse no man from secret devotion; it is better to take time from sleep, as David did, than not to find time for prayer. And this is our comfort, when we pray in the night, that we can never come unseasonably to the throne of grace; for we may have access to it at all hours. Baal may be asleep, but Israel's God never slumbers, nor are there any hours in which he may not be spoken with. | 
