But in the early 690s , for example , umayyad dinars from damascus suddenly switched from displaying heads of rulers to showing the shahada , the declaration of belief in the oneness of allah .
The later umayyad caliphs were relatively more corrupt and cared less about such religious issues .
后来的倭马亚哈里发则相对较为腐败,关心这些宗教问题少。
Most umayyad rulers insisted on arab primacy over non-arab converts to islam , while the abbasid caliphs accepted the principle of arab and non-arab equality as muslims .