The Reality of Khilafah — Page 144
SIRRUL-KHILAFAH— 144 anything other than Islam. Therefore, whoever follows him, it is better for him, and whoever turns away from him will not be able to frustrate the will of Allah. I have commanded my messenger to read my letter to you in all of your assemblies. The invitation to Allah’s cause shall be the Call to Prayer. If, when the Muslims raise the Call to Prayer, they respond likewise, then let them be, but if they do not respond to the Call to Prayer, then grant them no respite. And if they respond to the Call to Prayer, ask them about their obligations; if they refuse to fulfil them, then attack them, and if they agree, then accept it from them.