Ibn ‘Umar reported God’s messenger as saying, "I am commanded to fight with men till they testify that there is no god but God and that Muhammad is God's messenger, observe the prayer and pay the zakat . When they do that they will keep their lives and their property safe from me, except for what is due to Islam; and their reckoning will be at God’s hands.” (Bukhari and Muslim, but Muslim did not mention, "except for what is due to Islam”.)