And they ask thee of Zul Qarnain. Say thou: I shall recite unto you of him some mention. 83 Indeed We gave him authority in the land and bestowed him the means of everything. 84 With these he traveled 85 Till he reached the point of the setting sun, and saw it set behind a muddy lake, and near it found a people. We said: "O Dhu'l-Qarnain, you may either punish them or treat them with kindness." 86 He said: As to him who is unjust, we will chastise him, then shall he be returned to his Lord, and He will chastise him with an exemplary chastisement: 87 But as for him who believes and does righteous deeds - he will have the ultimate good [of the life to come] as his reward; and [as for us,] we shall make binding on him [only] that which is easy to fulfill." 88 Then followed he (another) way, 89 Until, when he came to the rising of the sun, he found it rising on a people for whom We had not made against it any shield. 90 Thus. And We had encompassed [all] that he had in knowledge. 91 Then he followed a road 92 until, when he reached between the two barriers, he found this side of them a people scarcely able to understand speech. 93 They said: O Zulqarnain! surely Gog and Magog make mischief in the land. Shall we then pay you a tribute on condition that you should raise a barrier between us and them 94 He replied, "The power that my Lord has granted me is better (than your tax). Help me with your man-power and I shall construct a barrier between you and Gog and Magog. 95 Bring me ingots of iron." Then after he had filled up the space between the two mountain-sides, he said: "(Light a fire) and ply bellows." When he had made it (red like) fire, he said: "Bring me molten copper which I may pour on it." 96 And (Gog and Magog) were not able to surmount, nor could they pierce (it). 97 Dhul-Qarnain) said: "This is a mercy from my Lord, but when the Promise of my Lord comes, He shall level it down to the ground. And the Promise of my Lord is ever true." 98 ۞ And on that Day [i.e. the Day Ya'juj and Ma'juj (Gog and Magog) will come out], We shall leave them to surge like waves on one another, and the Trumpet will be blown, and We shall collect them all together. 99 And We will present Hell that Day to the Disbelievers, on display - 100 whose eyes had been veiled against Our Quran and who were not able to hear (its recitation). 101