(Al-Kahf) 18 : 96
آتُونِي زُبَرَ الْحَدِيدِ ۖ حَتَّىٰ إِذَا سَاوَىٰ بَيْنَ الصَّدَفَيْنِ قَالَ انْفُخُوا ۖ حَتَّىٰ إِذَا جَعَلَهُ نَارًا قَالَ آتُونِي أُفْرِغْ عَلَيْهِ قِطْرًا
“Bring me sheets of iron", until when he had leveled between the two mountain walls; he said: "You blow fire on them" until when he made it; he said: "Bring me, I may pour over it, molten copper".
He made a perfect wall with iron sheets and molded upon it with copper.