26:187
فَأَسْقِطْ عَلَيْنَا كِسَفًا مِّنَ ٱلسَّمَآءِ إِن كُنتَ مِنَ ٱلصَّـٰدِقِينَ
fa-asqiṭ ʿalaynā kisafan mina l-samāi in kunta mina l-ṣādiqīna
Make bits of the heavens fall down on us, if you are telling the truth.’
"So cause a piece of the heaven to fall on us, if you are of the truthful!"