Tafsir of Al-Isra 17:92

أو تسقط السماء كما زعمت علينا كسفا

Or you cause the heaven to fall upon us in pieces, as you have pretended, means, `you promised us that on the Day of Resurrection the heavens will be split asunder, being broken and torn up, with parts of it falling down, so do that in this world and make it fall in pieces.' This is like when they said:

اللهم إن كان هذا هو الحق من عندك فٲمطر علينا حجارة من السماء

O Allah! If this (the Qur'an) is indeed the truth from You, then rain down stones on us from the sky. (8:32) Similarly, the people of Shu`ayb asked him:

فٲسقط علينا كسفا من السماء إن كنت من الصدقين

So cause a piece of the heaven to fall on us, if you are of the truthful! (26:187) So Allah punished them with the punishment of the day of Shadow (a gloomy cloud), which was the torment of a Great Day. (26:189)

أو تٲتي بالله والمﻼيكة قبيﻼ

or you bring Allah and the angels before (us) face to face;'' As for the Prophet of Repentance and Mercy, who was sent as a mercy to the worlds, he asked Allah to delay their punishment, in the hope that Allah would bring forth from their offspring people who would worship Allah Alone, with no partner or associate. This is what indeed did happen, for among those who are mentioned above were some who later embraced Islam and became good and sincere Muslims, even Abdullah bin Abi Umayyah, who followed the Prophet (out of that meeting) and spoke to him as he did. He became a sincere Muslim and turned to Allah in repentance