Imam Ali the first Imam of Shia

Imam Ali peace be upon him never fought his enemies in battles without first giving them the unequivocal answers to their arguments, and gave them warnings and plenty of opportunities to reflect. When he won in battles, he never took revenge on any of them. He pardoned them all. Imam Ali’s slogan after the fall of Mecca was:  “Today is the day of mercy; today, the inviolable are protected”