25 “In you, and in your seed, shall all the families of the earth be blessed.” (Gen. 28:14)
The same promise was repeated to Jacob, the grandson of Abraham. “and in you, and in your seed, shall all the families of the earth be blessed.” (Gen. 28:14) The apostle Paul fully settles the question in regard to who is meant by the “seed of Abraham.” He says, “Now to Abraham and his seed, were the promises made. He says not, and to seeds, as of many; but as of one, and to your seed, WHICH IS CHRIST.” (Gal. 3:16) Christ, then, is the seed of Abraham; and in him ALL the nations and families of the earth shall be blessed.
26.“You are the children of the prophets, and of the covenant which God made with our fathers, saying unto Abraham, in your seed shall all kindreds of the earth be blessed. Unto you first, God, having raised up his son Jesus, sent him to bless you, in turning away every one of you from his iniquities.” (Acts 3:25,26)
Peter, the apostle, understood this promise as referring to the salvation of men from sin, by Jesus Christ. Here we have a third term,- kindreds. All nations of the earth, all families of the earth, and all kindreds of the earth, must certainly signify all mankind. The import of this absolute, unconditional promise is, they shall all be blessed in Christ Jesus.