Contradiction with Genesis 21:10
This verse speaks about God instructing Abraham to send away Hagar and Ishmael, implying an inheritance exclusion that contrasts with the inheritance distribution in Genesis 25:5.
Genesis 21:10: Wherefore she said unto Abraham, Cast out this bondwoman and her son: for the son of this bondwoman shall not be heir with my son, [even] with Isaac.
Contradiction with Genesis 21:14
Abraham sends Hagar and Ishmael away with minimal provisions, contrasting with Genesis 25:5, where Abraham gives substantial possessions to Isaac.
Genesis 21:14: And Abraham rose up early in the morning, and took bread, and a bottle of water, and gave [it] unto Hagar, putting [it] on her shoulder, and the child, and sent her away: and she departed, and wandered in the wilderness of Beersheba.
Contradiction with Genesis 17:18-21
God establishes His covenant with Isaac, but Ishmael is also blessed, yet Genesis 25:5 focuses on Isaac receiving all Abraham's inheritance, showing exclusion of others.
Genesis 17:18-21: And Abraham said unto God, O that Ishmael might live before thee!