 Three or four rock inscriptions dating to Djedkare 's reign have been found in the Wadi <unk> in Sinai , where mines of copper and semi @-@ precious stones were exploited throughout the Old Kingdom , from the Fourth until the Sixth Dynasty . These inscriptions record three expeditions sent to look for turquoise : the earliest one , dated to the third or fourth cattle count – possibly corresponding to the sixth or eighth year of <unk> 's reign – explicitly recalls the arrival of the mining party to the " hills of the turquoise " after being given " divine authority for the finding of semi @-@ precious stones in the writing of the god himself , [ as was enacted ] in the broad court of the temple <unk> " . This sentence could indicate the earliest known record of an <unk> divination undertaken in order to ensure the success of the expedition prior to its departure , <unk> being the sun temple of Userkaf . Another inscription dating to the year of the ninth cattle count – possibly Djedkare 's 18th year on the throne – shows the king " <unk> all foreign lands . <unk> the chief of the foreign land " . The expedition that left this inscription comprised over 1400 men and administration officials . Some Egyptologists have proposed that these men were also sent to mine copper . 
