حَتَّىٰ إِذَا بَلَغَ بَيْنَ السَّدَّيْنِ وَجَدَ مِن دُونِهِمَا قَوْمًا لَّا يَكَادُونَ يَفْقَهُونَ قَوْلًا (93)
(18:93) till he reached between two mountains, *67 where he found a people who could hardly understand any language. *68
*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."