Going forth into Battle
We also sent iron, with its mighty strength and many benefits for humanity, so that God may test who will support His cause unseen.
57:25We verily sent Our messengers with clear proofs, and revealed with them the Scripture and the Balance, that mankind may observe right measure; and He revealed iron, wherein is mighty power and (many) uses for mankind, and that Allah may know him who helpeth Him and His messengers, though unseen. Lo! Allah is Strong, Almighty.