Genesis 41:1

“And it came to pass at the end of two full years, etc.] It is not a clear case, as Aben Ezra observes, from whence these years are to be reckoned, whether from the time of Joseph’s being put into prison, or from the time that the chief butler was taken out of it; the latter seems more probable, and better connects this and the preceding chapter: that Pharaoh dreamed, and, behold, he stood by the river; it seemed to him, in his dream, as if he stood near the river Nile, or some canal or flow of water cut out of that river.”

“PHARAOH'S DREAM. (Gen. 41:1-24) at the end of two full years--It is not certain whether these years are reckoned from the beginning of Joseph's imprisonment, or from the events described in the preceding chapter--most likely the latter. What a long time for Joseph to experience the sickness of hope deferred! But the time of his enlargement came when he had sufficiently learned the lessons of God designed for him; and the plans of Providence were matured. Pharaoh dreamed--"Pharaoh," from an Egyptian word Phre, signifying the "sun," was the official title of the kings of that country. The prince, who occupied the throne of Egypt, was Aphophis, one of the Memphite kings, whose capital was On or…”

“41:1-46 God had used two dreams to identify Joseph as a leader among his brothers (37:5-11). He used two dreams to test Joseph’s faith in prison (40:5-14). Now he would use two dreams to elevate Joseph from prison to preeminence. Joseph had repeatedly proven faithful in small matters; now he would be put in charge of great things. 41:1-4 Pharaoh’s first dream was about cows. Cows liked to stand half-submerged among the reeds in the Nile River to take refuge from the heat and flies. They would come out of the water to find pasture. The second group of cows disturbed Pharaoh because they were scrawny yet able to swallow the fat cows.”