At Tur Ayah 44

وَإِن يَرَوْاْ كِسْفًا مِّنَ ٱلسَّمَآءِ سَاقِطًا يَقُولُواْ سَحَابٌ مَّرْكُومٌ ٤٤ If they were to see a ?deadly? piece of the sky fall down ?upon them?, still they would say, “?This is just? a pile of clouds.”