HEBREWS 11:11 NKJ 11 By faith Sarah herself also received strength to conceive seed, and she bore a child when she was past the age, because
she judged Him faithful who had promised.
Sarah had a child when she was 91 years old. (Genesis 17:17-21) Physically, it was impossible. She had long since lost the ability to bear children.
But she did what she could not do. Sarah achieved this impossibility because of God’s promise, and because she believed God would keep his promise.