Isaiah 51:9

Awake, awake, put on strength, O arm of the LORD; awake, as in the ancient days, in the generations of old. [Art] thou not it that hath cut Rahab, [and] wounded the dragon?

Ver. 9. Awake, awake, O arm of the Lord.] God had promised what his holy arm should do for his people, Isa 51:5 now they beg of him to use it, and bestir himself for their relief and rescue; and this they do magno affectu atque animi impetu, heartily wishing the coming of Christ and the declaration of the gospel to their salvation.

Awake, as in the ancient days.] God seemeth sometimes to be asleep, and we must wake him; to delay, and we must quicken him; to have lost his compassions, which yet never fail, and we must find them for him.

Art not thou it that hath cut Rahab?] Or, Hewed Egypt with thy ten plagues successively, though she were a proud and potent state.

And wounded the dragon.] Or, Crocodile; that is, Pharaoh, Psa 74:14 whom thou didst put to pain, even the "pains of a travailing woman" (as the word signifieth), when he sank "as a millstone in the mighty waters."