Guarantees are mentioned in the Quran in these verses:

[68:35] Shall we treat the Submitters like the criminals?

[68:36] What is wrong with your logic?

[68:37] Do you have another book to uphold?

[68:38] In it, do you find anything you want?

[68:39] Or, have you received solemn assurances from us that grant you whatever you wish on the Day of Resurrection?

[68:40] Ask them, “Who guarantees this for you?”

[68:41] Do they have idols? Let their idols help them, if they are truthful.

[68:42] The day will come when they will be exposed, and they will be required to fall prostrate, but they will be unable to.

[68:43] With their eyes subdued, humiliation will cover them. They were invited to fall prostrate when they were whole and able.

[68:44] Therefore, let Me deal with those who reject this Hadith; we will lead them on whence they never perceive.

To learn more, read the Quran in English.

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