Genesis 18:12-14

12So Sarah laughed to herself as she thought, “After I am worn out and my lord is old, will I now have this pleasure?” 13Then the LORD said to Abraham, “Why did Sarah laugh and say, ‘Will I really have a child, now that I am old?’

14Is anything too hard for the LORD ? I will return to you at the appointed time next year, and Sarah will have a son.”