Romans 9:6-9 New King James Version (NKJV)

Israel’s Rejection and God’s Purpose

⁶ But it is not that the word of God has taken no effect. For they are not all Israel who are of Israel, ⁷ nor are they all children because they are the seed of Abraham; but, “In Isaac your seed shall be called.” ⁸ That is, those who are the children of the flesh, these are not the children of God; but the children of the promise are counted as the seed. ⁹ For this is the word of promise: “At this time I will come and Sarah shall have a son.”