Sunan Abi Dawud 4248

Musaddad narrated to us: Isa ibn Yunus narrated to us: al-Amash narrated to us, from Zayd ibn Wahb, from Abd al-Rahman ibn Abd Rabb al-Kabah, from Abd Allah ibn Amr: The Prophet ﷺ said, “Whoever pledges allegiance to an imam, giving him his handclasp and the devotion of his heart, let him obey him as much as he can. If another comes challenging him, strike the neck of the other man.” I asked, “Did you hear this from the Messenger of Allah ﷺ?” He said, “My two ears heard it, and my heart retained it.” I said, “This is your cousin Muawiyah; he orders us to do this and that.” He said, “Obey him in what is obedience to God, and disobey him in what is disobedience to God.”