Cross reference
Genesis 41:27
27 The seven lean and ill-favored cattle that came up after them are seven years, and also the seven empty heads of grain blasted with the east wind; they will be seven years of famine.
2 Kings 8:1
1 Now Elisha had spoken to the woman, whose son he had restored to life, saying, Arise, and go you and your household, and sojourn wherever you can sojourn: for Yahweh has called for a famine; and it shall also come on the land seven years.
2 Samuel 24:19
19 David went up according to the saying of Gad, as Yahweh commanded.