NSB(i)
6 It is not as if the word of God failed. Not all who come from Israel are really Israel.
7 It is not because they are Abraham’s that they are all children, but: »What will be called ‘your seed’ will be through Isaac.« (Genesis 21:12)
8 That is, the children of the flesh are not the children of God; but the children of the promise are counted as seed.