Until, when he reached [a pass] between two mountains, he found beside (18:93)

Almuntakhab Fi Tafsir Alquran Alkarim

Until he reached a stretch of territory towered by two barriers -probably mountains- beneath which he found a people who could hardly understand a foreign word or language

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(18:93) till he reached between two mountains, *67 where he found a people who could hardly understand any language. *68

Until, when he reached [a pass] between two mountains, he found beside meaning

*67) The "two mountains" must have been parts of that mountain range which runs between the Caspian Sea and the Black Sea (as stated in v. 96). This must be so because beyond them was the territory of Gog and Magog.
*68) That is, "It was difficult to communicate with them: their language was almost foreign to Zul-Qarnain and his companions, and, as they were quite barbaric, none could understand their language, nor were they acquainted with any foreign language."
 

Until, when he reached [a pass] between two mountains, he found beside meaning in Urdu

یہاں تک کہ جب دو پہاڑوں کے درمیان پہنچا تو اسے ان کے پاس ایک قوم ملی جو مشکل ہی سے کوئی بات سمجھتی تھی