Genesis 18:11-15

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?’

Is anything too difficult for the Lord? At the appointed time I will return to you, at this time next year, and Sarah will have a son.”

Sarah denied it, however, saying, “I did not laugh”; for she was afraid. And He said, “No, but you did laugh.”