Cross reference
Genesis 41:27
27 The seven thin and poor-looking cows who came up after them are seven years; and the seven heads of grain, dry and wasted by the east wind, are seven years when there will be no food.
2 Kings 8:1
1 Now Elisha had said to the woman whose son he had given back to life, Go now, with all the people of your house, and get a living-place for yourselves wherever you are able; for by the word of the Lord, there will be great need of food in the land; and this will go on for seven years.
2 Samuel 24:19
19 So David went up, as Gad had said and as the Lord had given orders.