Moses
Psalm 149:4BSB·traditional attribution

For the LORD takes pleasure in His people; He adorns the afflicted with salvation.

John Calvin Reformed @genevareformer

PSALM 149 If we may be allowed to compare this Psalm with the former ones, and the next, which is the last, the only difference is, that while the author of the Psalm, whoever he was, has hitherto spoken of God’s special care and protection of his Church in connection with the common providential government of the world, here he speaks of his benefits to the Church exclusively.

Commenting on Psalm 149:1-9

C.H. Spurgeon Reformed Baptist @princeofpreachers

For the Lord taketh pleasure in his people; and therefore they should take pleasure in him. If our joy be pleasing to him let us make it full. What condescension is this on Jehovah's part, to notice, to love, and to delight in his chosen!

Matthew Henry Presbyterian @wholebiblehenry

We have here, I. The calls given to God's Israel to praise. All his works were, in the foregoing psalm, excited to praise him; but here his saints in a particular manner are required to bless him. Observe then, 1. Who are called upon to praise God.

Commenting on Psalm 149:1-5