18:94
قَالُوا۟ يَـٰذَا ٱلْقَرْنَيْنِ إِنَّ يَأْجُوجَ وَمَأْجُوجَ مُفْسِدُونَ فِى ٱلْأَرْضِ فَهَلْ نَجْعَلُ لَكَ خَرْجًا عَلَىٰٓ أَن تَجْعَلَ بَيْنَنَا وَبَيْنَهُمْ سَدًّا٩٤
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?"
— Saheeh International