Awake, awake, put on strength, O arm of the LORD. Wake up as in days past, as in generations of old. Was it not You who cut Rahab to pieces, who pierced through the dragon?
In these verses we have, I. A prayer that God would, in his providence, appear and act for the deliverance of his people and the mortification of his and their enemies. Awake, awake! put on strength, O arm of the Lord! Isa 51:9. The arm of the Lord is Christ, or it is put for God himself, as Psa 44:23. Awake! why sleepest thou?
Commenting on Isaiah 51:9-16
Awake, awake, put on strength, O arm of the Lord,.... The Septuagint and Arabic versions take the words to be an address to Jerusalem; and the Syriac version to Zion, as in Isa 51:17, but wrongly: they are, as Jarchi says, a prayer of the prophet, or it may be rather of the church represented by him; and are addressed either to God the Father...
Impassioned prayer of the exiled Jews. ancient days-- (Psa 44:1). Rahab--poetical name for Egypt (see on Isa 30:7). dragon--Hebrew, tannin. The crocodile, an emblem of Egypt, as represented on coins struck after the conquest of Egypt by Augustus; or rather here, "its king," Pharaoh (see on Isa 27:1; Psa 74:13-14; Eze 32:2, Margin; Eze 29:3).