﴿ وَجَعَلْنَا فِى ٱلْأَرْضِ رَوَٰسِىَ أَن تَمِيدَ بِهِمْ وَجَعَلْنَا فِيهَا فِجَاجًۭا سُبُلًۭا لَّعَلَّهُمْ يَهْتَدُونَ ﴾

“And [are they not aware that] We have set up firm mountains on earth, lest it sway with them, and [that] We have appointed thereon broad paths, so that they might find their way,”

And We set in the earth firm mountains lest it should shake with them and We set in them in the firm mountains ravines as roads subulan substitutes for fijājan ‘ravines’ which are wide through-routes that perhaps they may be guided to their destinations during travel.