Shahadah

Testimony to the fact that Allah has the unique right to be worshipped to the exclusion of anything or anyone else and that the Prophet Muhammad is the Messenger of Allah by declaring, "Ashhadu an la ilaha illallah wa ashhadu anna Muhammadan rasulullah" (i.e. "I testify that there is no one or thing rightfully worshipped except Allah and that Muhammad is the Messenger of Allah).