Quran - Miracle - True religion from Allah

Surah 57 Verse 25. Al-Hadid (Iron), And we sent aforetime our apostles with Clear Signs and sent down with them the Book and the Balance (of Right and Wrong), that men may stand forth in justice; and We sent down Iron, in which is (material for) mighty war, as well as many benefits for mankind, that Allah may test who it is that will help, Unseen, Him and His apostles: For Allah is Full of Strength, Exalted in Might (and able to enforce His Will).