Job 28:1-4

“Surely there is a mine for silver, and a place for gold that they refine. Iron is taken out of the earth, and copper is smelted from the ore. Man puts an end to darkness and searches out to the farthest limit the ore in gloom and deep darkness. He opens shafts in a valley away from where anyone lives; they are forgotten by travelers; they hang in the air, far away from mankind; they swing to and fro.