Genesis 41:29-31

29Listen very carefully: seven years of great abundance will come throughout all the land of Egypt;

30but afterward seven years of famine and hunger will come, and [there will be such desperate need that] all the great abundance [of the previous years] will be forgotten in the land of Egypt [as if it never happened], and famine and destitution will ravage and destroy the land.

31So the great abundance will become forgotten in the land because of that subsequent famine, for it will be very severe.