Contradiction with Proverbs 24:17
This verse advises against rejoicing over enemy's downfall, contrasting Lamentations 3:63 where enemies mock and speak against the writer.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:
Contradiction with Matthew 5:44
This verse instructs to love and pray for enemies, opposite to the context of being mocked by adversaries in Lamentations 3:63.
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;