The Torah portion recounts the moment when Avraham and Sarah are told they will have a son, despite their advanced age. Sarah laughs to herself, doubting the possibility due to both her and Avraham's old age, and is subsequently rebuked by Hashem for her skepticism. Commentators explore why Sarah was singled out for rebuke when Avraham also laughed at the news previously, suggesting that Hashem addresses the lesser transgressor and that Sarah's doubt was more pronounced due to her disbelief after miraculous signs. The discussion also delves into the nuances of Sarah's laughter, whether it was directed at herself or Avraham, and the Torah's choice to alter her words for the sake of peace. Ultimately, the story highlights the subtle nature of doubt and faith among even the greatest figures, and the fulfillment of Hashem's promise with the birth of their son.