Romans 9:6-8

ASV(i) 6 But [it is] not as though the word of God hath come to nought. For they are not all Israel, that are of Israel: 7 neither, because they are Abraham's seed, are they all children: but, In Isaac shall thy seed be called. 8 That is, it is not the children of the flesh that are children of God; but the children of the promise are reckoned for a seed.