Genesis 18:9-12 KJV

9 And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent.

10 And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.

11 Now Abraham and Sarah were old and well stricken in age; and it ceased to be with Sarah after the manner of women.

12 Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?