Surah Al-Kahf (The Cave), Verse 94

قَالُوْا یٰذَا الْقَرْنَیْنِ اِنَّ یَاْجُوْجَ وَمَاْجُوْجَ مُفْسِدُوْنَ فِی الْاَرْضِ فَهَلْ نَجْعَلُ لَكَ خَرْجًا عَلٰۤی اَنْ تَجْعَلَ بَیْنَنَا وَبَیْنَهُمْ سَدًّا ۟

Qaaloo yaa Zal qarnaini inna Ya'jooja wa Ma'jooja mufsidoona fil ardi fahal naj'alu laka kharjan 'alaaa an taj'ala bainanaa wa bainahum saddaa

“They said: "O Zul-qarnain! the Gog and Magog (People) do great mischief on earth: shall we then render thee tribute in order that thou mightest erect a barrier between us and them?”

Quran 18:94 (Yusuf Ali Translation)