﴿ وَيَسْـَٔلُونَكَ عَنِ ٱلْجِبَالِ فَقُلْ يَنسِفُهَا رَبِّى نَسْفًۭا ﴾

“AND THEY WILL ask thee about [what will happen to] the mountains [when this world comes to an end]. Say, then: "My Sustainer will scatter them far and wide,”

Please check ayah 20:108 for complete tafsir.