Romans 9:4-8

4Who are Israelites; to whom pertain the adoption, and the glory, and the covenants, and the giving of the law, and the service of God, and the promises;1 5Whose are the fathers, and from whom according to the flesh Christ came, who is over all, God blessed for ever. Amen.

6Not as though the word of God hath taken no effect. For they are not all Israel, who are descended from Israel: 7Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called. 8That is, They who are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed.