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-bai‘ bil raqam
Al-ikhtiyar
Al-katib
Al-‘urwd
Al-musharrif
Suftajah
Al-tas‘ir
Al-amin al-`amm
Al-kasib
Al-khabalah