Genesis 41:29

New International Version

Seven years of great abundance are coming throughout the land of Egypt,

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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.

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

but seven years of famine will follow them. Then all the abundance in Egypt will be forgotten, and the famine will ravage the land.