Joseph was thirty years old when he entered the service of Pharaoh king of Egypt. And Joseph went out from Pharaoh’s presence and traveled throughout Egypt. During the seven years of abundance the land produced plentifully. Joseph collected all the food produced in those seven years of abundance in Egypt and stored it in the cities. In each city he put the food grown in the fields surrounding it. Joseph stored up huge quantities of grain, like the sand of the sea; it was so much that he stopped keeping records because it was beyond measure.
Before the years of famine came, two sons were born to Joseph by Asenath daughter of Potiphera, priest of On. Joseph named his firstborn Manasseh and said, “It is because God has made me forget all my trouble and all my father’s household.” The second son he named Ephraim and said, “It is because God has made me fruitful in the land of my suffering.”

Genesis 41:46-52 NKJ