Genesis 41:1-3

Now it happened at the end of two full years that Pharaoh had a dream, and behold, he was standing by the Nile. And lo, from the Nile there came up seven cows, sleek and fat; and they grazed in the marsh grass. Then behold, seven other cows came up after them from the Nile, ugly and gaunt, and they stood by the other cows on the bank of the Nile.