Genesis 18:12-14

So Sarah laughed to herself [when she heard the LORD’S words], saying, “After I have become old, shall I have pleasure and delight, my lord (husband) being also old?” [1 Pet 3:6] And the LORD asked Abraham, “Why did Sarah laugh [to herself], saying, ‘Shall I really give birth [to a child] when I am so old?’ Is anything too difficult or too wonderful for the LORD? At the appointed time, when the season [for her delivery] comes, I will return to you and Sarah will have a son.” [Matt 19:26]