Genesis 18:9-13

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

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

Now Abraham and Sarah were old, advanced in age; Sarah was past childbearing.

So Sarah laughed to herself, saying, “After I have become old, am I to have pleasure, my lord being old also?”

But the Lord said to Abraham, “Why did Sarah laugh, saying, ‘Shall I actually give birth to a child, when I am so old?’