⁷ Just because people can claim Abraham as their father does not make them his true children. But in the Scriptures, it says, “Through Isaac your covenant children will be named.”^{[a] 8} The proper interpretation is this: Abraham’s children by natural descent are not necessarily God’s covenant people; what matters is that His children receive and live the promise. ⁹ For this is the word God promised: “In due time, I will come, and Sarah will give birth to a son.”^[b]