Genesis 18:9-15

They said to him, “Where is your wife Sarah?” And he said, “There, in the tent.” Then one said, “I will surely return to you in due season, and your wife Sarah shall have a son.” And Sarah was listening at the tent entrance behind him. Now Abraham and Sarah were old, advanced in age; it had ceased to be with Sarah after the manner of women. So Sarah laughed to herself, saying, “After I have grown old, and my husband is old, shall I be fruitful?” The LORD said to Abraham, “Why did Sarah laugh and say, ‘Shall I indeed bear a child, now that I am old?’ Is anything too wonderful for the LORD? At the set time I will return to you, in due season, and Sarah shall have a son.” But Sarah denied, saying, “I did not laugh,” for she was afraid. He said, “Yes, you did laugh.”