Contradiction with Genesis 21:6
This verse indicates that Sarah laughed with joy at the fulfillment of God's promise, contrasting her initial skeptical laughter in Genesis 18:12.
Genesis 21:6: And Sarah said, God hath made me to laugh, [so that] all that hear will laugh with me.
Contradiction with Luke 1:37
This verse states that nothing is impossible with God, which contradicts Sarah's doubt in God's promise indicated by her laughter in Genesis 18:12.
Luke 1:37: For with God nothing shall be impossible.
Contradiction with Hebrews 11:11
This verse shows Sarah as having faith by receiving strength to conceive, contrary to her doubt expressed in Genesis 18:12.
Hebrews 11:11: 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.