Al Kahf, 97 Ayah
18:97
فَمَا ٱسۡطَٰعُوٓاْ أَن يَظۡهَرُوهُ وَمَا ٱسۡتَطَٰعُواْ لَهُۥ نَقۡبٗا ٩٧
Famā Asţā`ū 'An Yažharūhu Wa Mā Astaţā`ū Lahu Naqbāan
So Gog and Magog were unable to pass over it, nor were they able [to effect] in it any penetration.