Columbia subject headings:
Muḥammad, Prophet, -632--Companions.
Shīʻah--Doctrines.
Harvard subject headings:
Muḥammad, Prophet, -632--Friends and associates.
Shīʻah--Doctrines
Princeton subject headings:
Muḥammad, Prophet, -632--Companions.
Shīʻah--Doctrines.