Contradiction with Matthew 5:44
1 Chronicles 5:18 discusses warriors and battle, while Matthew 5:44 preaches love and prayers for enemies, advocating non-violence.
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 Exodus 14:14
1 Chronicles 5:18 emphasizes warriors preparing for battle, whereas Exodus 14:14 suggests the Lord will fight and one should remain still.
Exodus 14:14: The LORD shall fight for you, and ye shall hold your peace.
Contradiction with Romans 12:19
1 Chronicles 5:18 involves taking arms, but Romans 12:19 advises against vengeance and leaving it to God's wrath.
Romans 12:19: Dearly beloved, avenge not yourselves, but [rather] give place unto wrath: for it is written, Vengeance [is] mine; I will repay, saith the Lord.
Contradiction with Isaiah 2:4
1 Chronicles 5:18 describes readiness for war, while Isaiah 2:4 envisions the cessation of war and transformation of weapons into peaceful tools.
Isaiah 2:4: And he shall judge among the nations, and shall rebuke many people: and they shall beat their swords into plowshares, and their spears into pruninghooks: nation shall not lift up sword against nation, neither shall they learn war any more. [pruninghooks: or, scythes]