Contradiction with Exodus 20:13
Esther 7:9 implies a sentence of execution, whereas Exodus prohibits killing.
Exodus 20:13: Thou shalt not kill.
Contradiction with Matthew 5:44
Esther 7:9 involves plotting against an enemy, while Jesus teaches to love and pray for 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 7:9 is about vengeance by humans, while Romans 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 7:9 includes rejoicing over the downfall of an enemy, while Proverbs advises against it.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:
Contradiction with Isaiah 1:17
Esther 7:9 involves seeking justice through punishment, while Isaiah encourages seeking justice protectively and defending the oppressed.
Isaiah 1:17: Learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow. [relieve: or, righten]