The Book of Prayers (Kitab Al-Salat)

Muslim :: Book 4 : Hadith 740

Abu Mahdhura said that the Apostle of Allah (may peace be upon him) taught him Adhan like this: Allah is the Greatest, Allah is the Greatest; I testify that there is no god but Allah, I testify that there is no god but Allah; I testify that Muhammad Is the Messenger of Allah, I testify that Muhammad is the Messenger of Allah, and it should be again repeated: I testify that there is no god but Allah, I testify that there is no god but Allah; I testify that Muhammad Is the Messenger of Allah, I testify that Muhammad is the Messenger of Allah. Come to the prayer (twice). Come to the prayer (twice). Ishaq added: Allah is the Greatest, Allah is the Greatest; there Is no god but Allah.

Source materials are from the University of Southern California MSA site
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