Quran 21:96 from Surah Al-Anbiyaa on Divine Marvels.
حَتَّىٰٓ إِذَا فُتِحَتۡ يَأۡجُوجُ وَمَأۡجُوجُ وَهُم مِّن كُلِّ حَدَبٖ يَنسِلُونَ
English translation: Until when has been opened (for) the Yajuj and Majuj and they from every elevation descend
Transliteration: hatta idha futihat yajuju wamajuju wahum min kulli hadabin yansiluna