Bay'ah

[3] Bay'ah derives from the Semitic triconsonantal root B-Y-’, related to commerce, and shows the contractual nature of the bond between caliph and the people.

It is an acceptance of what has already been done, a compliance with an accomplished fact a fait accompli represented by the seizure of power by the new ruler.

Anybody who wanted to join the growing Islamic community did so by reciting the basic creed expressing faith in the oneness of God and the prophethood of Muhammad.

It is reported that at annual gatherings outside Mecca, Muhammad met people from Yathrib (later renamed Medina), who accepted his call towards Islam.

With the abolition of the Caliphate, Bayʿah remains in use today by some modern Muslim kingdoms such as Saudi Arabia and Morocco.

[11] After the Pledge of the Tree, which led to the Treaty of Hudaybiyyah, the following was revealed in the Qur'an commemorating and appreciating the pledge and those who made it: Certainly Allah was well pleased with the believers when they swore allegiance to you under the tree, and He knew what was in their hearts, so He sent down tranquillity on them and rewarded them with a near victory, The bayʿah of Rizwan, a mass initiation of thousands of Muslims at the hands of Muhammad, is mentioned in the Qur'an.