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‘ al-fasid
Islah
Habal al-habalah
Infaq
Receivables
Ilm tadbir al-manzil
Financial Murabahah
Daribah al-ta‘am
Mudarib
ICD (Islamic Certificates of Deposit)