Contradiction with Proverbs 24:17
This verse advises against rejoicing or feeling glad at the downfall of one's enemies, whereas Jeremiah 48:31 speaks of wailing and lamentation over Moab.
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, which contrasts with the lamentation over Moab's destruction in Jeremiah 48:31.
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 12:15
This verse encourages to rejoice with those who rejoice and weep with those who weep. Jeremiah 48:31 laments over Moab, despite them being enemies.
Romans 12:15: Rejoice with them that do rejoice, and weep with them that weep.