Contradiction with Genesis 18:12
Sarah laughs in disbelief when she is told she will bear a child in her old age, which contrasts with Genesis 21:6 where her laughter is a response of joy and fulfillment.
Genesis 18:12: Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?
Contradiction with Hebrews 11:11
This verse celebrates Sarah's faith in God's promise, which contradicts with Genesis 21:6 where her initial laughter could be seen as a moment of doubt rather than unwavering faith.
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.
Contradiction with Genesis 16:2
Sarai (Sarah) expresses doubt about bearing children by suggesting Abram have a child with Hagar, contradicting the joy and fulfillment expressed in Genesis 21:6 when she eventually bears Isaac.
Genesis 16:2: And Sarai said unto Abram, Behold now, the LORD hath restrained me from bearing: I pray thee, go in unto my maid; it may be that I may obtain children by her. And Abram hearkened to the voice of Sarai. [obtain...: Heb. be built by her]
Contradiction with Genesis 17:17
Abraham laughs at the idea of having a child at such an old age, showing disbelief in contrast to the joyous laughter of fulfillment shared by Sarah in Genesis 21:6.
Genesis 17:17: Then Abraham fell upon his face, and laughed, and said in his heart, Shall [a child] be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?