COMMENTARY on 77:27
A. Yusuf Ali:

Translation:
And made therein mountains standing firm, 5876 lofty (in stature); and provided for you water sweet (and wholesome)?
Commentary:

5876  See n. 2038 to 16:15. The solid mountains are frequently referred to: cf. 13:3. The parable here is that the mountains are hard, solid rock, and yet they act as sponges to collect, store up, and filter sweet and wholesome water, which on account of their altitude they are able to distribute by gravity to the lower, dry land by means of rivers or springs. Anyone who has seen the parched Makkan valleys and the delicious springs in the mountains around, or the Zubaydah Canal , which is the main source of Makkah's water supply, will appreciate the aptness of the metaphor, but it applies to any country, though not to so striking a degree. If the wisdom and power of Allah can do such things before your eyes, how can you reject His teaching of a still more wonderful future Life?

 

Muhammad Asad:

Translation:
and have We not set on it proud, firm mountains, and given you sweet water to drink? 10
Commentary:
10  Parallel with the preceding, this verse refers to God's creation of inanimate matter, and thus rounds off the statement that He is the Maker of the universe in all its manifestations, both organic and inorganic.