For the Scripture says to Pharaoh, "For this very thing I have raised you up, that I may show My power in you, and that My name may be proclaimed in all the earth."
And the Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying that, "In you all the nations shall be blessed."
But what does the Scripture say? "Cast out the servant girl and her son, for the son of the servant girl will certainly not inherit with the son of the free woman."