Then HASHEM said to Abraham, "Why is it that Sarah laughed, saying: 'Is it even true that I shall give birth, though I have aged?' (Gen. 18:13)
Scripture altered its report of Sarah's words for the sake of peace, for she had said "and my husband is old." (Rashi, ibid.)The general understanding of this passage is that when HaShem confronted Avraham Avinu about his wife's response to the message from the angels, He changed the statement to one of self-deprecation on Sarah's part rather than a comment on her husband's age - ostensibly for the sake of shalom bayit (peace in the household).
A question on this Rashi has been bothering me for quite some time. We know that Sarah had a greater level of prophecy than Avraham; why did HaShem have to say anything to Avraham, and restate the facts to preserve marital harmony? Why didn't He just ask Sarah herself why she laughed?
If anybody has an answer, I'd be much obliged...