Romans 9:6-12

Clearly, God has not failed to fulfill his promises to Israel, for that will never happen! But not everyone who has descended from Israel belongs to Israel. Physical descent from Abraham doesn’t guarantee the inheritance, because God has said: “Through Isaac your descendants will be counted as part of your lineage.” 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