Psalms 119:148

“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 Psalms 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…”

“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. Psalms 119:149”

“eyes: Psa 119:62, Psa 63:1, Psa 63:6, Psa 139:17, Psa 139:18; Lam 2:19; Luk 6:12 the night watches: The ancient Jews divided the night into three watches of four hours each, beginning at six o'clock in the evening; before the last of which, "the day break," or "morning watch," as the LXX and Vulgate read, the Psalmist was awake. Psalms 119:149”