Romans 9:4-8

YLT(i) 4 who are Israelites, whose is the adoption, and the glory, and the covenants, and the lawgiving, and the service, and the promises, 5 whose are the fathers, and of whom is the Christ, according to the flesh, who is over all, God blessed to the ages. Amen.
6 And it is not possible that the word of God hath failed; for not all who are of Israel are these Israel; 7 nor because they are seed of Abraham are all children, but—`in Isaac shall a seed be called to thee;' 8 that is, the children of the flesh—these are not children of God; but the children of the promise are reckoned for seed;