Surah Al-Kahf (The Cave), Verse 96

اٰتُوْنِیْ زُبَرَ الْحَدِیْدِ حَتّٰۤی اِذَا سَاوٰی بَیْنَ الصَّدَفَیْنِ قَالَ انْفُخُوْا حَتّٰۤی اِذَا جَعَلَهٗ نَارًا قَالَ اٰتُوْنِیْۤ اُفْرِغْ عَلَیْهِ قِطْرًا ۟

Aatoonee zubaral hadeed, hattaaa izaa saawaa bainas sadafaini qaalan fukhoo hattaaa izaa ja'alahoo naaran qaala aatooneee ufrigh 'alaihi qitraa

“"Bring me blocks of iron." At length, when he had filled up the space between the two steep mountain-sides, He said, "Blow (with your bellows)" Then, when he had made it (red) as fire, he said: "Bring me, that I may pour over it, molten lead."”

Quran 18:96 (Yusuf Ali Translation)