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-‘ushr
Iman bil gha'ib
Al-diwan
Al-waqf ‘ala al-’awlad
Al-‘adl
’ard al-quni
Rahn
Al-bai‘ al-batil
Al-bai‘ al-fasid
Tijarah