Relating to the sources of Islamic law, it is the custom and the usage of a particular society.
Al-mu akarah
Al-dain al-mutlaq
Awqaf-i-Humayun
Triple Mudarabah
Habal al-habalah
Al-qanun
Al-’aqilah
Ijarah Muntahia Bitamlik
Al-‘amil
Iman bil gha'ib