Praise ye him, all his angels - Dwelling in the heavens. Compare the notes at Psalm 103:20.
Praise ye him, all his hosts - See the notes at Psalm 103:21 and the notes at Isaiah 1:9. All his armies - referring to the angels considered as marshalled into hosts, of which God is the Head and Leader.

Praise ye him, all (a) his angels: praise ye him, all his hosts.
(a) Because they are members of the same body, he sets them before our eyes, who are most willing and by their prompt obedience teach us to do our duty.

Praise ye him, all his angels,.... The Targum adds, who minister before him: the ministering spirits, the angels of Jehovah, even of Christ, who are his creatures, and at his command; and whom he sends forth to minister to others, Hebrews 1:7. And great numbers there are of them, thousands and tens of thousands, yea, an innumerable company; and all of them are under obligation to praise the Lord for their creation: for invisible spirits, as well as visible bodies, even the celestial thrones, dominions, principalities, and powers, were created by him, by Christ, Colossians 1:16. And for their preservation in their beings, and confirmation in that happy estate in which they were created; being chosen and secured in Christ, the head of all principality and power, and so stood while others fell: and also for the various excellent powers, and faculties and properties, they are endowed with; they excel in strength, are possessed of great agility and swiftness; have a large share of knowledge, of things natural, civil, moral, spiritual, and evangelical; are perfectly holy, and without sin; and happy in the enjoyment of God, in whose presence they always are, and whose face they continually behold; and will ever remain in this state, being immaterial and immortal beings. And as praise is their duty, it is their work; in this they were employed at the creation of all things, then these sons of God and morning stars sang and shouted for joy; and at the incarnation of Christ, when they worshipped him; at the conversion of every sinner; and frequently join the church in this service, and will be concerned in it to all eternity: and when the psalmist calls upon them to engage in it, it does not suppose that they were deficient in it, or backward to it, or that he had any authority over them to require it of them; but it shows his great desire that the Lord might be praised by the noblest creatures, and in the best manner that could be, and how much his heart was in this work; and he does it to stir up himself and others the more unto it, from this consideration; that if those heavenly creatures should praise the Lord, then much more such as he and others, who were so very unworthy of the divine favours, and so much beholden to the Lord for them;
praise ye him, all his hosts; meaning either the angels as before, sometimes called the hosts of heaven, and the heavenly host; there being armies and legions of them, and these encamping about the saints in a military way; see 2-Kings 19:35; or else the celestial bodies, the sun, moon, and stars, as follow, sometimes called the host of heaven; and who are represented as militant, Genesis 2:1, 2-Kings 21:3.

hosts--(compare Psalm 103:21).