Complex sentence: Umar II ordered governors to cease collection of taxes from Muslim converts, but his successors obstructed this policy and some governors sought to stem the tide of conversions by introducing additional requirements such as circumcision and the ability to recite passages from the Quran.
Split into simpler sentences: Umar II ordered governors to cease collection of taxes from Muslim converts, but his successors obstructed this policy. Some governors sought to stem the tide of conversions by introducing additional requirements such as circumcision and the ability to recite passages from the Quran.