For the buyer to keep something as mortgage in case of a third party’s later claim on the goods; withholding a part of the price as a mortgage.
Al-’awraj
Al-ijarah thumma al-ba'i
Al-jibayah
Al-taswiyah
Al-mashiyah
Ta’widh
Al-dinar al-dhahaby
Al-waqf al-khairi
Ushr al-tijarah
Al-munasabah