2 verses have
sky
in Edition Clear Qur'an by Talal Itani / Al-Israa (The Night Journey)

17:92Or make the sky fall on us in pieces, as you claim, or bring God and the angels before us.

17:93Or you possess a house of gold. Or you ascend into the sky. Even then, we will not believe in your ascension, unless you bring down for us a book that we can read.” Say, “Glory be to my Lord. Am I anything but a human messenger?”