Al-Anbiyaa • BN-TAFSEER-IBN-E-KASEER
﴿ 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,”
Please check ayah 21:33 for complete tafsir.