Iron is sharpened by iron; so a man sharpeneth the countenance of his friend.
Vedan and Javan of Uzal traded in thy markets: wrought iron, cassia, and calamus were in thy traffic.
2 Samuel 22:35
He teacheth my hands to war, And mine arms bend a bow of brass.
The shield of his mighty men is made red, the valiant men are in scarlet: the chariots glitter with the sheen of steel, in the day of his preparation, and the spears are brandished.
Is my strength the strength of stones? is my flesh of brass?
If he have fled from the iron weapon, the bow of brass shall strike him through.
Who teacheth my hands to war, and mine arms bend a bow of brass;
The chariots rush madly in the streets, they justle one against another in the broad ways: the appearance of them is like torches, they run like lightnings.
and they had breastplates as breastplates of iron, and the sound of their wings was as the sound of chariots of many horses running to war;
lading of gold, and silver, and precious stones, and pearl, and fine linen, and purple, and silk, and scarlet dye, and all thyine wood, and every article in ivory, and every article in most precious wood, and in brass, and in iron, and in marble,