Great example of Love and Hate for the sake of Allah (Al Wala’ Wal Bara’).
Caesar of the Romans:
“We know what occured between you and Ali (Ibn Abi Talib), and we see that you are more worthy of the Khilafah, so if you order me, I will send you an army that will bring you the head of Ali.”
Response from Muawiyah to Heraql:
“Two brothers dispute and what is it to you to enter between them? If you are not silent, I will send you an army that starts with you and ends with me, that will bring me your head so I can gift it to Ali.”
Such were the true Muslims unlike the Muslims you find in high positions at the current state.