The Abbasids were the third Caliphate dynasty of the Islamic empire. Their coins differed only slightly from those of their precursors, the Umayyads. Both gold and silver coins bore on the reverse the short legend "Mohammed is the prophet of Allah." This legend had been used on Umayyad silver coins as part of the marginal inscription for a while, and had long been the legend on bronze coins. This dirham bears the traditional formula on the obverse, the Kalima: "There is no god except Allah, he has no partner."