Ibrahim bin Tahman إبراهيم بن طهمان · The Book of Fighting [The Prohibition of Bloodshed]

"I heard Mu'awiyah delivering the Khutbah, and he narrated a few Hadiths from the Messenger of Allah say: Every sin may be forgiven by Allah except a man who kills a believer deliberately, or a man who dies as a disbeliever.'"

"Some people raided the milk camels of the Messenger of Allah had their hands and feet cut off and their eyes gouged out." This is the wording of Ibn Al-Muthanna.