فَأَسْقِطْ عَلَيْنَا كِسَفًا مِّنَ السَّمَاء إِن كُنتَ مِنَ الصَّادِقِينَ
[26:187]
Therefore cause a portion of the heaven to come down upon us, if you are one of the truthful.
"Now cause a piece of the sky to fall on us, if thou art truthful!"
Then make fragments of the heaven fall upon us, if thou art of the truthful.