Imam al-A'mash (may Allah have mercy on him) narrates, through Abdul Rahman bin Abi Ziyad (may Allah have mercy on him), from Sayyiduna Abdullah bin al-Harith (may Allah be pleased with them both) that Sayyiduna Amr bin al-As (may Allah be pleased with him) said to Sayyiduna Mu'awiyah (may Allah be pleased with him): "O Commander of the Believers! Did you not hear the Messenger of Allah (peace and blessings be upon him) say, while he (peace and blessings be upon him) was building the mosque, to Sayyiduna Ammar (may Allah be pleased with him): 'You are eager for jihad, you are among the people of Paradise, and the rebellious group will kill you'?" He said: "Certainly." He said: "Then why did you kill him?" He said: "By Allah! You keep slipping in your own urine. Did we kill him? He was killed only by the one who brought him (to the battlefield)."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16807