Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.
Dan also and Javan going to and fro occupied in thy fairs: bright iron, cassia, and calamus, were in thy market.
2 Samuel 22:35
He teacheth my hands to war; so that a bow of steel is broken by mine arms.
The shield of his mighty men is made red, the valiant men are in scarlet: the chariots shall be with flaming torches in the day of his preparation, and the fir trees shall be terribly shaken.
Is my strength the strength of stones? or is my flesh of brass?
He shall flee from the iron weapon, and the bow of steel shall strike him through.
He teacheth my hands to war, so that a bow of steel is broken by mine arms.
The chariots shall rage in the streets, they shall justle one against another in the broad ways: they shall seem like torches, they shall run like the lightnings.
And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots of many horses running to battle.
The merchandise of gold, and silver, and precious stones, and of pearls, and fine linen, and purple, and silk, and scarlet, and all thyine wood, and all manner vessels of ivory, and all manner vessels of most precious wood, and of brass, and iron, and marble,