The sale of goods that are unknown or undetermined as to their quantity, especially foodstuffs. Such a sale is considered invalid until the goods have been received by the purchaser.
Diwan al-kharaj
Al-faij
Al-jizyah
PLS System
Sud (Urdu)
Al-farsakh
Tijarah
Riba al-nasi'ah
Bai‘ al-salam
Bai al-ta'ati