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Vision of the Glorious Man
7And I, Daniel, alone saw the vision, for the men who were with me did not see the vision; but a great terror fell upon them, so that they fled to hide themselves. 8Therefore I was left alone when I saw this great vision, and no strength remained in me; for my vigor was turned to frailty in me, and I retained no strength. 9Yet I heard the sound of his words; and while I heard the sound of his words I was in a deep sleep on my face, with my face to the ground.
Prophecies Concerning Persia and Greece
Daniel 10:7-9 (NKJV)