Contradiction with Romans 12:17
This verse advises to not repay evil for evil, contradicting the willingness to surrender to the Ammonites in 1 Samuel 11:10 without a fight.
Romans 12:17: Recompense to no man evil for evil. Provide things honest in the sight of all men.
Contradiction with Matthew 5:39
This verse teaches to turn the other cheek, conflicting with the implied preparation for battle in the narrative surrounding 1 Samuel 11:10.
Matthew 5:39: But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.