'Iron' in the Bible

Now while the temple was being built, it was built [with] stones finished [at the] quarry, [so that] no hammer or stone shaping tool or any instrument of iron was heard in the temple as it was being built.

for they [are] your people and your inheritance whom you brought from Egypt from the middle of the smelter of iron.

Zedekiah son of Kenaanah made horns of iron for himself and said, "Thus says Yahweh: 'With these you shall gore the Arameans until finishing them.'"