وَجَعَلْنَا فِيهَا رَوَاسِيَ شَامِخَاتٍ وَأَسْقَيْنَاكُم مَّاءً فُرَاتًا
and set in it lofty [and] firm mountains, and given you agreeable water to drink?
Agha Ali Puya Commentary
Commentary on Quran 77:27
[Pooya/Ali Commentary 77:27] (see commentary for verse 17)