You, O king, are the king of kings, to whom the God of heaven has given sovereignty, power, strength, and glory.
Daniel here gives full satisfaction to Nebuchadnezzar concerning his dream and the interpretation of it. That great prince had been kind to this poor prophet in his maintenance and education; he had been brought up at the king's cost, preferred at court, and the land of his captivity had hereby been made much easier to him than to others of his brethren.
Commenting on Daniel 2:31-45
Thou, O king, art a king of kings,.... Having many kings subject and tributary to him, or would have; as the kings of Judah, Ammon, Moab, and others, and who were even his captives and prisoners; see Jer 52:32. Jarchi and Saadiah join this with the next clause, "the God of heaven", and interpret it of him thus, thou, O King Nebuchadnezzar, "the King of...
Thou . . . art a king of kings--The committal of power in fullest plenitude belongs to Nebuchadnezzar personally, as having made Babylon the mighty empire it was. In twenty-three years after him the empire was ended: with him its greatness is identified (Dan 4:30), his successors having done nothing notable.