Contradiction with Exodus 20:13
Esther 9:21 celebrates a military victory whereas this verse commands not to kill.
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 5:44
Esther 9:21 involves retaliation and vengeance, whereas this verse instructs to love enemies.
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
Esther 9:21 depicts carrying out vengeance, whereas this verse advises leaving vengeance to God.
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 Proverbs 24:17
Esther 9:21 is a celebration of victory over enemies, whereas this verse advises not to rejoice when an enemy falls.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth: