The tribe, under one of its chieftains Jarir ibn Abd Allah, played a major role in the Muslim army that conquered Iraq in the mid-7th century.

[2] In Muhammad's last years, a Qasri chieftain, Jarir ibn Abd Allah al-Bajali, led a delegation of 150 of his tribesmen and converted to Islam in the prophet's presence.

[1] They were subsequently dispatched to demolish the Dhul Khalasa sanctuary, which the polytheistic Bajila and Khath'am tribes had worshiped until then.

[1] During the latter's rule, the Bajila under Jarir were a powerful component of the Muslim army that conquered Iraq (Lower Mesopotamia), accounting for 700 to over 1,500 warriors,[2] and were accorded a fourth of the lands of its agriculturally rich Sawad region.

[1] According to historian Julius Wellhausen, the ascent of Islam rejuvenated the Bajila to a certain degree following a period of severe decline.