That they shall drive thee from men, and thy dwelling shall be with the beasts of the field, and they shall make thee to eat grass as oxen, and they shall wet thee with the dew of heaven, and seven times shall pass over thee, till thou know that the most High ruleth in the kingdom of men, and giveth it to whomsoever he will.
They shall drive thee - a Chaldee idiom for thou shalt be driven. Hypochondriacal madness was his malady, which "drove" him, under the fancy that he was a beast, to "dwell with the beasts:" Daniel 4:34 proves this, "Mine understanding returned unto me." The regency would allow him to roam in the large beast-abounding parks attached to the palace.
They shall make thee to eat grass - i:e., vegetables, or herbs in general (Genesis 3:18, "Thou shalt eat the herb of the field").
They shall wet thee with the dew of heaven - i:e., thou shalt be wet with the dew.
Till thou know that the Most High ruleth in the kingdom of men - (Psalms 83:17-18, "Let them be confounded ... that men may know that thou, whose name alone is Yahweh, art most high over all the earth;" Jeremiah 27:5).