The conversation and interaction between Mordechai and Haman, when Haman arrived to carry out Achashverosh's reward: Megillah 16a
Haman and Mordechai after the King's reward to Mordechai: Megillah 16a
The advice of Haman's advisors to him, regarding dealing with Mordechai, based upon Mordechai's tribe, if he was from Yehudah, Binyamin, Ephraim or Menasheh: Megillah 16a