Surah Al-Kahf, ayah 93

18:93

حَتَّىٰٓ إِذَا بَلَغَ بَيۡنَ ٱلسَّدَّيۡنِ وَجَدَ مِن دُونِهِمَا قَوۡمٗا لَّا يَكَادُونَ يَفۡقَهُونَ قَوۡلٗا ٩٣

Hattā idhā balagha baynas-saddayni wajada min dūnihimā qawmal lā yakādūna yafqahūna qawlā

Until, when he reached [a pass] between two mountains, he found beside them a people who could hardly understand [his] speech.