'Iron' in the Bible

And He hath gone round the thickets of the forest with iron, And Lebanon by a mighty one falleth!

He hath wrought iron with an axe, And hath wrought with coals, And with hammers doth form it, And doth work it by his powerful arm, Yea, he is hungry, and there is no power, He doth not drink water, and he is wearied.

'I go before thee, and crooked places make straight, Two-leaved doors of brass I shiver, And bars of iron I cut asunder,

From my knowing that thou art obstinate, And a sinew of iron thy neck, And thy forehead brass,

Instead of the brass I bring in gold, And instead of the iron I bring in silver, And instead of the wood brass, And instead of the stone iron, And I have made thy inspection peace, And thy exactors righteousness.