Genesis 18:9-15

9Then they said to him, “Where is Sarah your wife?” And he said, “There, in the tent.”

10He said, “I will surely return to you at this time next year; and behold, Sarah your wife will have a son.” And Sarah was listening at the tent door, which was behind him.

11Now Abraham and Sarah were old, well advanced in years; she was past [the age of] childbearing.

12So 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?”

13And the Lord asked Abraham, “Why did Sarah laugh [to herself], saying, ‘Shall I really give birth [to a child] when I am so old?’

14Is 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.”

15Then Sarah denied it, saying, “I did not laugh”; because she was afraid. And He (the Lord) said, “No, but you did laugh.”