Genesis 45:7

And God sent me before you
This he repeats to impress the minds of his brethren with a sense of the good providence of God in bringing him to Egypt before them, to make provision for their future welfare, and to alleviate their grief, and prevent an excessive sorrow for their selling him into Egypt, when by the overruling hand of God it proved so salutary to them: to preserve you a posterity in the earth;
that they and theirs might not perish, which otherwise, in all human probability, must have been the case; and that the promise of the multiplication of Abraham's seed might not be made of none effect, but continue to take place, from whence the Messiah was to spring: and to save your lives by a great deliverance;
from the extreme danger they were exposed unto, through the terrible famine, and in which deliverance were to be observed the great wisdom, goodness, power, and providence of God.