Isaiah 51:9

Awake, awake, thou who hast carried thyself like one asleep, and unconcerned for thy people, and unable to save them. The prophet having foretold what great things God would do for his church, and longing for the accomplishment of them, and knowing that prayer was one means by which God fulfils his promises, he poureth forth his prayer to God in his own name, and in the name of God's people. Put on strength; clothe and adorn thyself with mighty works; put forth thy strength. That hath cut, Heb. hewed, with thy sword, Rahab; Egypt, so called here, and Psalms 87:4, Psalms 89:10, either from its pride or strength, or from the shape and figure of that land. The dragon; Pharaoh, so called Psalms 74:13 Ezekiel 29:3, Ezekiel 32:2.