Chapter One: The Pentateuch

Sarah is now beyond the point of childbearing (Gn 17:17; 18:11) and Abraham is infer-tile (Rom 4:19). It has not yet been revealed that Ishmael is not to be the heir of the promise, but God now makes it clear (Gn 17:15-22). Three times God explicitly says that Sarah will bear Abraham’s son of promise. ................
................