ed ▁with ▁pac ifying ▁the ▁province , ▁which ▁was ▁pl ag ued ▁by ▁a ▁long standing ▁conflict ▁between ▁the ▁Arab ▁tribes ▁there . ▁He ▁initially ▁sent ▁his ▁brother ▁al - M ug hi rah ▁to ▁take ▁control ▁of ▁al - M ans ur ah , ▁but ▁the ▁city ' s ▁inhabitants ▁re bel led ▁and ▁exp elled ▁him . ▁Daw ud ▁then ▁entered ▁al - S ind ▁in ▁force ▁and ▁laid ▁sie ge ▁to ▁al - M ans ur ah , ▁which ▁he ▁managed ▁to ▁take ▁several ▁months ▁later . ▁He ▁then ▁proceeded ▁to ▁secure ▁the ▁other ▁cities ▁of ▁al - S ind , ▁thereby ▁firm ly ▁re est ab lish ing ▁Abb as id ▁control ▁over ▁the ▁province . ▁ ▁Daw ud ▁spent ▁the ▁next ▁two ▁dec ades ▁as ▁governor ▁of ▁al - S ind , ▁setting ▁a ▁record ▁for ▁the ▁longest ▁ten ure ▁of ▁any ▁governor ▁in ▁the ▁early ▁Abb as id ▁period . ▁Cond itions ▁in ▁the ▁province ▁remained ▁quiet ▁for ▁the ▁remainder ▁of ▁his ▁administration . ▁He ▁died ▁in ▁ 8 2 0 ▁or ▁ 8 2 1 ▁and ▁was ▁succeeded ▁by ▁his ▁son ▁B ish r . ▁ ▁Notes ▁ ▁References ▁Al - Bal ad h uri , ▁A hm ad ▁ibn ▁J ab ir . ▁The ▁Orig ins ▁of ▁the ▁Islam ic ▁State , ▁Part ▁II . ▁Trans . ▁Francis ▁Clark ▁M urg ot ten . ▁New ▁York : ▁Columbia ▁University , ▁ 1 9 2 4 . ▁Cr one , ▁Pat ric ia . ▁" M