Therefore...

Therefore, Hassan ibn Thabit, who was a person from the `Uthmanite Group, came to Qays and said that he was given a raw deal that he was deposed although you were not a part of the conspiracy to kill `Uthman. Qays said angrily: “O person with no vision! Get away from here! If I had not the fear that war would commence between my tribe and yours, I would have killed you now!”[1] Marwan ibn al-Hakam and al-Aswad ibn al-Bukhtari too threatened him.

When he felt that there was a danger of being made a captive, or even killed, he went to Amir al-Mu’minin (a.s) in al-Kūfah with Sahl ibn Hunayf. When Mu`awiyah learned about this, he wrote in anger to Marwan and al-Aswad: