'Iron' in the Bible

The Temple was constructed of stone precut at the quarry so that no hammer, axe, or any other iron implement would be heard in the Temple while it was being built.

"Show your compassion in the presence of those who have taken them captive, so they may show compassion on them, since they are your people and your heritage, which you brought out of Egypt, from an iron fire furnace.

Chenaanah's son Zedekiah made iron horns for himself and told them, "This is what the LORD says, "With these horns you are to gore the Arameans until they are eliminated!'"