Isaiah 41:14-16

Fear not, thou worm Jacob Who art weak in thyself, despised and trodden under foot by thy proud and potent enemies. I will make thee a new sharp thrashing instrument Such as were usual in those times and places. Thou shall thrash the mountains and hills The great and lofty potentates of the world, which set themselves against thee: or, the greater or lesser kingdoms or countries which were enemies to God's truth and people; so the phrase signifies, Isaiah 2:14, and Psalms 72:3. The expressions of this and the following verse allude to the custom of the eastern countries, of having their thrashing-floors upon the tops of hills and mountains. Thou shalt fan them When thou hast beaten them as small as chaff; and the wind shall carry them away They shall no more molest thee; they shall be scattered and lost. And thou shalt glory in the Holy One of Israel For to him, and not to thyself, thou shalt ascribe thy victory over thine enemies.