Genesis 45:7

And God sent me before you to preserve you a posterity in the earth and to save your lives by a great deliverance. The saving of the patriarchal family, the bearers of the Messianic promise, was of even greater importance than the preserving of the Egyptians. It was the will of God, as Joseph now recognized very clearly, that the family and the posterity of Jacob should be kept alive through this famine, the final result being that they would be a multitude, escaped from death and destruction. Even here the Messianic idea is not wanting.