The Shahada, also spelled Shahadah, (Arabic: الشهادة aš-šahāda from the verb šahida "to testify") is the Muslim declaration of belief in the oneness of God and acceptance of Muhammad as his prophet.
The Shahada in Arabic reads:
ašhadu ʾanna laa ilāha illa (A)llāh, wa ʾašhadu ʾanna Muḥammada(n) rasūlo (A)llāh
“I testify that - There is no god but Allah,
and I testify - Muhammad is the Messenger of Allah"