John Gill's Exposition of the Whole Bible
Psalms 149:2
Let Israel rejoice in him that made him,.... Or, "in his Makers" i, Father, Son, and Spirit; as in Job 35:10; see also Ecclesiastes 12:1; for all three Persons had a concern in the creation of man at first, "let us make man", c. Genesis 1:26 and have in the formation of every individual man; of the Israelites as men, and of them as a body politic and ecclesiastic, being raised up, constituted, and formed by the Lord in their civil and church state, and therefore had reason to rejoice in him, Deuteronomy 32:6; and so have all the spiritual Israel of God, whom he has chosen, redeemed, and called; every Israelite indeed, all who are the workmanship of God, the people he has formed for himself, and to show forth his praise: these should rejoice in God the Father, who has chosen them in Christ, blessed them with all spiritual blessings in him, sent him to redeem them, has justified them by his righteousness, pardoned their sins through his blood, adopted them and made them heirs of glory; and in the Son of God their Redeemer, they should rejoice in his person, in his righteousness, sacrifice, and fulness; and in the Holy Spirit, who has regenerated and sanctified them, is their Comforter, and the earnest of their future glory;
let the children of Zion be joyful in their King: not in David, unless as a type, but in his Son, the King Messiah, who is King of Zion; and therefore the children of Zion, the church, who are born of her, the mother of us all, and born in her through the ministry of the word, and brought up there by means of the Gospel, and the ordinances of it; such as are regenerate persons, sons of God, and members of Gospel churches, should rejoice in Christ, the King of saints; that they have such a King over them, who is the greatest of Kings, the King of kings, and Lord of lords; so righteous in the administration of his government, so wise in making laws for them, so powerful to protect and defend them; and who must reign tilt all enemies are put under his feet, even for ever and ever. Every appearance of Christ's kingdom is matter of joy to saints; his first coming was as a King, though in a mean and lowly manner; yet joyful to Zion and her children, Zechariah 9:9; his ascension to heaven, when he was declared Lord and Christ; the pouring forth of his Spirit, and the success of his Gospel in the Gentile world, to the overthrow of Paganism in it, Revelation 12:10; and especially it will be an occasion of great joy to his subjects, when he takes to himself his great power, and reigns, Revelation 11:15.
i בעשיו "in factoribus suis", Gejerus, Michaelis; so Ainsworth.