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Surah سُورَةُ الكَهۡفِ · Al-Kahf
Verse 18:97
فَمَا ٱسْطَٰعُوٓا۟ أَن يَظْهَرُوهُ وَمَا ٱسْتَطَٰعُوا۟ لَهُۥ نَقْبًۭا
So Gog and Magog were unable to pass over it, nor were they able [to effect] in it any penetration.
Translation · English
Qur'an 18:97
Translation is a paraphrase, not a replacement for the Arabic. For deeper study, consult a tafsir resource or qualified scholar.