Lit: One-fifth. Tech: It has come to be known as one-fifth share of the state from the booty. In the early days of Islam, it used to be one of the major sources of public revenue.
Al-mal al-khas
Al-ju‘l
Al-tanajush
Al-luqatah
Al-jahbadh
Al-kalalah
Al-bai‘ al-mun‘aqad
Al-ma'adin al-batin
Al-rabi'
Mudarabah al-muqayyadah (restricted mudarabah)