If Sarah had said that she was his wife, Abraham might have been killed and thus could not have produced the offspring whom God had promised him. ​ — wp17.3, pp. 14 - 15.
אילו הייתה שרה אומרת שהיא אשת אברהם, הוא עלול היה להיהרג ולא להקים את הזרע שהבטיח לו אלוהים (‏ מצ3.17, עמ ’ 14, 15‏) .‏