Genesis 18:10-12

10And He said, “I will certainly return to you according to the time of life, and behold, Sarah your wife shall have a son.” (Sarah was listening in the tent door which was behind him.)

11Now Abraham and Sarah were old, well advanced in age; and Sarah had passed the age of childbearing.

12Therefore Sarah laughed within herself, saying, “After I have grown old, shall I have pleasure, my lord being old also?”