I, Daniel, was the only one who saw the vision; those who were with me did not see it, but such terror overwhelmed them that they fled and hid themselves. (NIV)
And I, Daniel, alone saw the vision [of this heavenly being], for the men who were with me did not see the vision, but a great trembling fell upon them so that they fled to hide themselves. (AMP)
And I Daniel alone saw the vision: for the men that were with me saw not the vision; but a great quaking fell upon them, so that they fled to hide themselves. (KJV)