Job 28:2-4

Revised Standard Version

² Iron is taken out of the earth,
    and copper is smelted from the ore.
³ Men put an end to darkness,
    and search out to the farthest bound
    the ore in gloom and deep darkness.
⁴ They open shafts in a valley away from where men live;
    they are forgotten by travelers,
    they hang afar from men, they swing to and fro.