Columbia subject headings:
Islam--Doctrines.
Muslim scholars.
Muḥammad, Prophet, -632--Companions.
Ulama.
Harvard subject headings:
Muḥammad, Prophet, -632--Companions.
Muḥammad, Prophet, -632--Friends and associates.
Muslim scholars--Biography.
Ulama--Biography
Princeton subject headings:
Muḥammad, Prophet, -632.