Contradiction with Matthew 5:44
This verse promotes love and prayer for enemies, whereas 1 Chronicles 18:5 describes military victory over them.
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 12:19
Advises against taking personal vengeance, contradicting the act of defeating enemies in 1 Chronicles 18:5.
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.