Mine 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 Commentary

119:145-152 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 Commentary

Verses 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.