Genesis 41:26, 46, 49

The seven good cows are seven years, and the seven good heads of grain are seven years; it is one and the same dream.

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.

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.