They said, "O Dhul-Qarnayn, indeed Gog and Magog1 are [great] corrupters in the land. So may we assign for you an expenditure that you might make between us and them a barrier?"
He said, "That in which my Lord has established me is better [than what you offer], but assist me with strength [i.e., manpower]; I will make between you and them a dam.
Bring me bars of iron" - until, when he had leveled [them] between the two mountain walls, he said, "Blow [with bellows]," until when he had made it [like] fire, he said, "Bring me, that I may pour over it molten copper."
[Dhul-Qarnayn] said, "This is a mercy from my Lord; but when the promise of my Lord1 comes [i.e., approaches], He will make it level, and ever is the promise of my Lord true."
Then do those who disbelieve think that they can take My servants instead of Me as allies? Indeed, We have prepared Hell for the disbelievers as a lodging.