sentences:  It is known to have been practiced by the Islamic prophet Muhammad and his successors (caliphs) after him with those wishing to join the Islamic community.Within the Sufi tradition the term is used to refer to the process of initiation into a Sufi order with the idea of commending oneself to a spiritual master in exchange for the spiritual and moral guidance imparted by him.The Bay'ah is a practice that also forms a notable feature within Ahmadiyya Islam.