Psalms 68:33

To him that rideth upon the heavens of heavens -The highest heavens. The heaven of heaven would properly mean the heaven above that which is heaven to us; that is, the heaven above the sky. This is represented as the special dwelling-place of God. The Jews were accustomed to speak of three heavens: (a) The aerial heaven, or the region above us, where the birds fly, and the winds blow; (b) the starry heavens, or the firmament in which the stars are fixed; and (c) the heaven above all, the abode of God and of angels. The word “rideth” here means that he appears there as a conqueror, or that he moves in majesty and glory. See the notes atPsalms 18:10.