Genesis 41:26, 46, 49

The seven good cows are seven years, and the seven good ears are seven years; the [two] dreams are one [and the same].

Now Joseph [had been in Egypt thirteen years and] was thirty years old when he stood before Pharaoh, king of Egypt. Joseph departed from the presence of Pharaoh and went through all the land of Egypt [performing his duties].

Thus Joseph gathered and stored up grain in great abundance like the sand of the sea, until he stopped counting it, for it could not be measured.