Musannaf Ibn Abi Shaybah 40493 — Reports on Uthman (may Allah be)

Bishr bin Shaghaf said: Sayyiduna Abdullah bin Salam (may Allah be pleased with him) asked me about the Khawarij. I said: "They are the people who pray the longest and fast the most, except that when they have crossed the bridge they shed blood and seize property." He said: "None but such a person should be asked about them. Indeed, I said to them: 'Do not kill Sayyiduna Uthman (may Allah be pleased with him); leave him, for by Allah, if you leave him for eleven (nights), he will surely die a natural death on his bed.' But they did not do so. Indeed, no prophet was ever killed except that seventy thousand people were killed for him, and no caliph was ever killed except that thirty-five thousand were killed for him."