<b>And the Lord remembered Sarah (Gen. 21:1).</b> Scripture says elsewhere in allusion to this verse: <i>Then the nations that are left round about shall know that I, the Lord, have builded the stricken places, and have planted that which was desolate: I, the Lord, have spoken it, and I will do it</i> (Ezek. 36:36).
<i>The nations shall know</i> refers to the women who taunted Sarah by calling her a barren woman. <i>I, the Lord, have builded the stricken places</i> indicates that she was stricken with old age, as it is said: <i>And Abraham and Sarah were old, and well stricken with age</i> (Gen. 18:11). <i>Have planted that which is desolate</i> refers to her remark: <i>After I am waxed old, shall I have pleasure?</i> (ibid., v. 12). <i>And I, the Lord, have spoken it, and I will do it</i> is stated because it is said: <i>And God remembered Sarah as He has said, and the Lord did unto Sarah as He had spoken</i> (ibid. 21:1).
Sarah conceived on Rosh Hashanah, and Isaac was born in the seventh month, on the night of Passover, as is said: <i>I will certainly return unto thee when the season cometh around</i> (Gen. 18:10). Four barren women conceived on Rosh Hashanah: Sarah, Rebecca, Rachel, and Leah.