“Through faith also Sara herself received strength to conceive seed, and was delivered of a child when she was past age, because she judged him faithful who had promised.”
King James Version (KJV)
11:11 Sarah also herself - Though at first she laughed at the promise, #Gen 18:12|. #Gen 21:2|.
Heb 11:11 Through faith also Sara received strength to conceive seed. See Ge 17:15-21 18:11-14 21:1-2. Far beyond the years of child bearing, yet by faith she was give natural strength to bear the child of promise. She was about ninety years old (Ge 17:17).