I saw in the visions of my head upon my bed, and, behold, a {g} watcher and an holy one came down from heaven;

(g) Meaning the angel of God, who neither eats nor sleeps, but is always ready to do God's will, and is not infected with man's corruption, but is always holy. And in that he commands to cut down this tree, he knew that it would not be cut down by man, but by God.

Wesley's Notes

4:13 A watcher - A holy angel, the instrument of God, to execute God's judgments which the angels watch constantly to perform.

Scofield Reference Notes

Margin watcher

Dan 4:17,23, plural in 17.

Jamieson-Fausset-Brown Bible Commentary

13. watcher and an holy one-rather, "even an holy one." Only one angel is intended, and he not one of the bad, but of the holy angels. Called a "watcher," because ever on the watch to execute God's will [Jerome], (Ps 103:20, 21). Compare as to their watchfulness, Re 4:8, "full of eyes within . they rest not day and night." Also they watch good men committed to their charge (Ps 34:7; Heb 1:14); and watch over the evil to record their sins, and at God's bidding at last punish them (Jer 4:16, 17), "watchers" applied to human instruments of God's vengeance. As to God (Da 9:14; Job 7:12; 14:16; Jer 44:27). In a good sense (Ge 31:49; Jer 31:28). The idea of heavenly "watchers" under the supreme God (called in the Zendavesta of the Persian Zoroaster, Ormuzd) was founded on the primeval revelation as to evil angels having watched for an opportunity until they succeeded in tempting man to his ruin, and good angels ministering to God's servants (as Jacob, Ge 28:15; 32:1, 2). Compare the watching over Abraham for good, and over Sodom for wrath after long watching in vain for good men it it, for whose sake He would spare it, Ge 18:23-33; and over Lot for good, Ge 19:1-38 Daniel fitly puts in Nebuchadnezzar's mouth the expression, though not found elsewhere in Scripture, yet substantially sanctioned by it (2Ch 16:9; Pr 15:3; Jer 32:19), and natural to him according to Oriental modes of thought.

Matthew Henry's Concise Commentary

4:1-18 The beginning and end of this chapter lead us to hope, that Nebuchadnezzar was a monument of the power of Divine grace, and of the riches of Divine mercy. After he was recovered from his madness, he told to distant places, and wrote down for future ages, how God had justly humbled and graciously restored him. When a sinner comes to himself, he will promote the welfare of others, by making known the wondrous mercy of God. Nebuchadnezzar, before he related the Divine judgments upon him for his pride, told the warnings he had in a dream or vision. The meaning was explained to him. The person signified, was to be put down from honour, and to be deprived of the use of his reason seven years. This is surely the sorest of all temporal judgments. Whatever outward affliction God is pleased to lay upon us, we have cause to bear it patiently, and to be thankful that he continues the use of our reason, and the peace of our consciences. Yet if the Lord should see fit by such means to keep a sinner from multiplying crimes, or a believer from dishonouring his name, even the dreadful prevention would be far preferable to the evil conduct. God has determined it, as a righteous Judge, and the angels in heaven applaud. Not that the great God needs the counsel or concurrence of the angels, but it denotes the solemnity of this sentence. The demand is by the word of the holy ones, God's suffering people: when the oppressed cry to God, he will hear. Let us diligently seek blessings which can never be taken from us, and especially beware of pride and forgetfulness of God.