Romans 9:8-12

This confirms that it is not merely the natural offspring of Abraham who are considered the children of God; rather, the children born because of God’s promise are counted as descendants. For God promised Abraham: “Now is the time! For in nine months your wife, Sarah, will have a son!” Now, this son was our ancestor, Isaac, who, with his wife, Rebekah, conceived twins. And before her twin sons were born, God spoke to Rebekah and said