Jamieson, Fausset and Brown on Genesis 41:15-16

15-16. Pharaoh said, ... I have dreamed a dream--The king's brief statement of the service required brought out the genuine piety of Joseph; disclaiming all merit, he ascribed whatever gifts or sagacity he possessed to the divine source of all wisdom, and he declared his own inability to penetrate futurity; but, at the same time, he expressed his confident persuasion that God would reveal what was necessary to be known.