The word(s) "mountains" appears 52 time(s) in 48 verse(s) in Quran in Mohsin Khan translation.

(21) "And you hew out in the mountains, houses with great skill.

(22) Is not He (better than your gods) Who has made the earth as a fixed abode, and has placed rivers in its midst, and has placed firm mountains therein, and has set a barrier between the two seas (of salt and sweet water)? Is there any ilah (god) with Allah? Nay, but most of them know not!

(23) And you will see the mountains and think them solid, but they shall pass away as the passing away of the clouds. The Work of Allah, Who perfected all things, verily He is Well-Acquainted with what you do.

(24) He has created the heavens without any pillars that you see, and has set on the earth firm mountains lest it should shake with you. And He has scattered therein moving (living) creatures of all kinds. And We send down water (rain) from the sky, and We cause (plants) of every goodly kind to grow therein.

(25) And when a wave covers them like shades (i.e. like clouds or the mountains of sea-water), they invoke Allah, making their invocations for Him only. But when He brings them safe to land, there are among them those that stop in between (Belief and disbelief). But none denies Our Signs except every perfidious ingrate.

(26) Truly, We did offer Al-Amanah (the trust or moral responsibility or honesty and all the duties which Allah has ordained) to the heavens and the earth, and the mountains, but they declined to bear it and were afraid of it (i.e. afraid of Allah's Torment). But man bore it. Verily, he was unjust (to himself) and ignorant (of its results).

(27) And indeed We bestowed grace on Dawud (David) from Us (saying): "O you mountains. Glorify (Allah) with him! And you birds (also)! And We made the iron soft for him."

(28) See you not that Allah sends down water (rain) from the sky, and We produce therewith fruits of various colours, and among the mountains are streaks white and red, of varying colours and (others) very black.

(29) Then ask them (i.e. these polytheists, O Muhammad صلى الله عليه وسلم): "Are they stronger as creation, or those (others like the heavens and the earth and the mountains) whom We have created?" Verily, We created them of a sticky clay.

(30) Verily, We made the mountains to glorify Our Praises with him [Dawud (David)] in the 'Ashi (i.e. after the mid-day till sunset) and Ishraq (i.e. after the sunrise till mid-day).