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.
Irtifaqat
Diwan al-birr wa al-sadaqah
Orfi hukuk
Bai‘ al-muqayadah
Fair Price
Haqq
Esham
Khiyar al-shart
Dar al-arqam
Bay` bi-thaman ajil