Bereshis 18:11-13

Orthodox Jewish Bible

¹¹ Now Avraham and Sarah were zekenim (old ones) and well stricken in age; and [in childbearing] it ceased to be with Sarah after the manner of women.

¹² Therefore Sarah laughed [titzchak, sounds like Yitzchak] within herself, saying, After I am grown old shall I have pleasure, adoni being old also?

¹³ And Hashem said unto Avraham, Why did Sarah laugh, saying, Shall I which am old of a surety bear a child?