(748) ‘Abdullah b. Amr b. al-As reported Allah’s Messenger, peace be upon him, as saying: When the Mu’adhdhin (the one who call the Adhan) says: Allah is the Greatest, Allah is the Greatest, and one of you should make this response: Allah is the Greatest, Allah is the Greatest; and (when the Mu’adhdhin) says: I testify that there is no God but Allah, one should respond: I testify that there is no God but Allah. And when he says: I testify that Muhammad is the Messenger of Allah, one should make a response: I testify that Muhammad is the Messenger of Allah. When he says: Come to prayer, one should make a response: There is no might and no power except with Allah. When he says: Come to salvation, one should response: There is no might and no power except with Allah.and when he (the Mu’adhdhin) says: Allah is the Greatest, Allah is the Greatest, then make a response: Allah is the Greatest, Allah is the Greatest. When he says: There is no god but Allah, and he who makes a response from the heart: There is no god but Allah, he will enter Paradise.