Contradiction with Proverbs 24:17
Warns against rejoicing when an enemy falls, which contradicts the joy over victory in Psalms 35:9.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:
Contradiction with Matthew 5:44
Encourages loving your enemies, in contrast to the adversarial tone of Psalms 35:9.
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 seeking personal vengeance, contradicting the theme of vindication in Psalms 35:9.
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.