Contradiction with Exodus 20:13
"Thou shalt not kill" contradicts the act of warfare and killing described in Numbers 31.
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 5:44
"Love your enemies" conflicts with the destruction of enemies detailed in Numbers 31.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Romans 12:17
"Recompense to no man evil for evil" opposes the retaliatory actions in Numbers 31.
Romans 12:17: Recompense to no man evil for evil. Provide things honest in the sight of all men.
Contradiction with Proverbs 25:21
"If thine enemy be hungry, give him bread to eat" contrasts the treatment of enemies in Numbers 31.
Proverbs 25:21: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Matthew 7:12
"Therefore all things whatsoever ye would that men should do to you, do ye even so to them" contradicts the treatment of captives in Numbers 31.
Matthew 7:12: Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law and the prophets.