(Arabic: testimony), the Muslim profession of faith: There is no god but Allah; Muhammad is the prophet of Allah. The shahadah is the first of the five Pillars of Islam (arkan al-Islam). It must be recited by every Muslim at least once in a lifetime, aloud, correctly, and purposively, with a full understanding of its meaning and with an assent of the heart.
SHAHADAH
Meaning of SHAHADAH in English
Britannica English vocabulary. Английский словарь Британика. 2012