Romans 9:3-8

9:3 For I could wish that I myself were accursed – cut off from Christ – for the sake of my people, my fellow countrymen, 9:4 who are Israelites. To them belong the adoption as sons, the glory, the covenants, the giving of the law, the temple worship, and the promises. 9:5 To them belong the patriarchs, and from them, by human descent, came the Christ, who is God over all, blessed forever! Amen.

9:6 It is not as though the word of God had failed. For not all those who are descended from Israel are truly Israel, 9:7 nor are all the children Abraham’s true descendants; rather “through Isaac will your descendants be counted.” 9:8 This means it is not the children of the flesh who are the children of God; rather, the children of promise are counted as descendants.