Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
quran:26:187

So cause to fall upon us fragments of the sky, if you should be of the truthful."  

Then make fragments (read kisfan or kisafan) of the heaven fall upon us, if you are of the truthful’, in your Mission.
القرآن:٢٦:١٨٧

فَأَسْقِطْ عَلَيْنَا كِسَفًا مِنَ السَّمَاءِ إِنْ كُنْتَ مِنَ الصَّادِقِينَ  

{فأسقط علينا كسْفا} بسكون السين وفتحها قطعا {من السماء إن كنت من الصادقين} في رسالتك.