Romans 9:6-8 Not however that God's word has failed; for all who have sprung from Israel do not count as Israel,

WNT⁽ⁱ⁾ ⁶ Not however that God's word has failed; for all who have sprung from Israel do not count as Israel, ⁷ nor because they are Abraham's true children. But the promise was "THROUGH ISAAC SHALL YOUR POSTERITY BE RECKONED." ⁸ In other words, it is not the children by natural descent who count as God's children, but the children made such by the promise are regarded as Abraham's posterity.