Official designation for informal partnership during Fatimids (AD 969–1171) and ’Ayubid (AD 1183–1260) Egypt.
Bai‘ ‘ala al-bai‘
Bay` bi-thaman ajil
Istishab
Al-qist
Al-mahrum
Al-sa‘i
Al-saibah
Bait al-mal
Haqq al-irtifaq
Bint labun
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