Al-Kahf 18:94

قَالُواْ يَٰذَا ٱلۡقَرۡنَيۡنِ إِنَّ يَأۡجُوجَ وَمَأۡجُوجَ مُفۡسِدُونَ فِي ٱلۡأَرۡضِ فَهَلۡ نَجۡعَلُ لَكَ خَرۡجًا عَلَىٰٓ أَن تَجۡعَلَ بَيۡنَنَا وَبَيۡنَهُمۡ سَدّٗا 94

They said, "O Dhul-Qarnayn, indeed Gog and Magog are [great] corrupters in the land. So may we assign for you an expenditure that you might make between us and them a barrier