Ayah 52:44
وَإِن يَرَوْا كِسْفًا مِّنَ السَّمَاءِ سَاقِطًا يَقُولُوا سَحَابٌ مَّرْكُومٌ
And if they were to see a fragment from the sky falling down, they would say: “[It is merely] clouds heaped up”.
This ayah concludes a section that began with the instruction to the Prophet ﷺ to remind, followed by the accusations levelled against him, and a series of challenges exposing the falsehood and insincerity behind those accusations.
“Even if they were to see a piece of the sky falling down, they would say: ‘clouds piled up’.”