TSK · Numbers 31:22

And Zillah, she also bare Tubal-cain, the forger of every cutting instrument of brass and iron: and the sister of Tubal-cain was Naamah.

But all the silver, and gold, and vessels of brass and iron, are holy unto Jehovah: they shall come into the treasury of Jehovah.

Iron is taken out of the earth, And copper is molten out of the stone.