▁and ▁each ▁stage ▁had ▁horses , ▁don keys ▁or ▁cam els ▁ready ▁to ▁carry ▁the ▁post . ▁Prim arily ▁the ▁service ▁met ▁the ▁needs ▁of ▁Government ▁officials , ▁but ▁trav ellers ▁and ▁their ▁important ▁dispatch es ▁were ▁also ▁benef ited ▁by ▁the ▁system . ▁The ▁postal ▁carri ages ▁were ▁also ▁used ▁for ▁the ▁swift ▁transport ▁of ▁troops . ▁They ▁were ▁able ▁to ▁carry ▁fifty ▁to ▁a ▁hundred ▁men ▁at ▁a ▁time . ▁Under ▁Governor ▁Y us uf ▁bin ▁U mar , ▁the ▁postal ▁department ▁of ▁Ira q ▁cost ▁ 4 , 0 0 0 , 0 0 0 ▁dir h ams ▁a ▁year . ▁ ▁Di wan ▁al - Q ud at ▁ ▁In ▁the ▁early ▁period ▁of ▁Islam , ▁justice ▁was ▁admin ister ed ▁by ▁Muhammad ▁and ▁the ▁orth odox ▁C ali ph s ▁in ▁person . ▁After ▁the ▁expansion ▁of ▁the ▁Islam ic ▁State , ▁U mar ▁al - F aru q ▁had ▁to ▁separate ▁jud ici ary ▁from ▁the ▁general ▁administration ▁and ▁appointed ▁the ▁first ▁q adi ▁in ▁Egypt ▁as ▁early ▁as ▁AD ▁ 6 4 3 / 2 3 ▁A H . ▁After ▁ 6 6 1 , ▁a ▁series ▁of ▁jud ges ▁served ▁in ▁Egypt ▁during ▁the ▁cal i ph ates ▁of ▁H ish am ▁and ▁Wal id ▁II . ▁ ▁Di wan ▁al - J und ▁The ▁Di wan ▁of ▁U mar , ▁assigning ▁ann u ities ▁to ▁all ▁Arab s ▁and ▁to ▁the ▁Muslim ▁soldiers ▁of ▁other ▁races , ▁under w ent ▁a ▁change ▁in ▁the