Contradiction with Numbers 3:10
This verse states that only Aaron and his descendants shall serve in the priest's office, whereas 1 Chronicles 23:13 suggests an expanded priesthood role.
Numbers 3:10: And thou shalt appoint Aaron and his sons, and they shall wait on their priest's office: and the stranger that cometh nigh shall be put to death.
Contradiction with Hebrews 7:12
This verse notes a change in the priesthood and the law, suggesting a transition away from Aaron's lineage, contradicting the exclusive priesthood of Aaron's line mentioned in 1 Chronicles 23:13.
Hebrews 7:12: For the priesthood being changed, there is made of necessity a change also of the law.