South of Egypt , Djedkare dispatched at least one expedition to the diorite quarries located 65 km ( 40 mi ) north @-@ west of Abu Simbel . Djedkare was not the first king to do so , as these quarries was already exploited during the Fourth Dynasty and continued to be so during the Sixth Dynasty and later , in the Middle Kingdom period ( c . 2055 BCE – c . 1650 BCE ) .