حَتّٰىٓ اِذَا بَلَغَ بَيْنَ السَّدَّيْنِ وَجَدَ مِنْ دُوْنِهِمَا قَوْمًاۙ لَّا يَكَادُوْنَ يَفْقَهُوْنَ قَوْلًا ( الكهف: ٩٣ )
Hattaaa izaa balagha bainas saddaini wajada min doonihimaa qawmal laa yakaa doona yafqahoona qawlaa (al-Kahf 18:93)
Until, when he reached [a pass] between two mountains, he found beside them a people who could hardly understand [his] speech. (Al-Kahf  : 93)
1 Mufti Taqi Usmani
until when he reached between the two mountains, he found by them a people who were almost unable to understand anything said.