Genesis 41:25

God hath shewed Pharaoh. Joseph declared first of all that the two dreams had the same meaning, and pointed to their Author, God, who thereby sought to warn Pharaoh and his subjects of events to come. The number seven, which played so prominent a role in the dreams, pointed to two periods of seven years each. The fat cows and the full ears represented seven abundant harvests; the lean ones, seven barren years. The latter would follow the former over the whole land of Egypt, so that the years of famine would leave no trace of the seven fruitful years. Joseph added that the repetition of the dream was to emphasize the certainty of the events indicated and the urgency of taking measures to meet the emergency. Joseph’s confidence in his interpretation, which looked 14 years into the future, in contrast with the perplexity of the Egyptian wise men, could not fail to impress the king.