Romans 9:8-9 That is to say, it is not his physical descendants who are children of God, but his descendants born in fulfilment of the promise who are considered his true posterity.

Goodspeed⁽ⁱ⁾ ⁸ That is to say, it is not his physical descendants who are children of God, but his descendants born in fulfilment of the promise who are considered his true posterity. ⁹ For this is what the promise said: "When I come back at this time next year, Sarah will have a son."