Contradiction with Proverbs 21:31
Joshua 23:3 attributes victory to the Lord, but this verse emphasizes preparedness and the role of the horse in battle, suggesting a human effort in winning battles.
Proverbs 21:31: The horse [is] prepared against the day of battle: but safety [is] of the LORD. [safety: or, victory]
Contradiction with Deuteronomy 8:17
Joshua 23:3 credits the Lord for accomplishments, whereas this verse warns of believing that one's own power has achieved outcomes, highlighting a tendency to self-credit rather than attributing successes to divine intervention.
Deuteronomy 8:17: And thou say in thine heart, My power and the might of [mine] hand hath gotten me this wealth.