A cubit devised by the second caliph, ‘Umar b. al-Khattab (13–23 AH), to measure lands of Sawad. It measured a cubit (prevalent) plus a grip of clasped hand and a thumb.
Al-mubadharah
Bai‘ al-salam
Al-ijarah bi shart al-tamlik
Khiyar al-shart
Al-dinar al-fiddi
Al-bai‘ al-mabrur
Al-‘afw
Al-ta‘awun
Dai'ah al-khassah
Al-bai‘ al-batil