Read The Noble Qur’ān
We will show them Our signs in the universe and within themselves until it becomes clear to them that this is the truth. Is it not enough that your Lord is a Witness over all things?
[QURAN 41:53]
“And if you all are in doubt about what I have revealed to My servant, bring a single chapter like it, and call your witnesses besides Allāh [God] if you are truthful.”
Quran [2:23]
But if you are unable to do so—and you will never be able to do so—then fear the Fire fuelled with people and stones, which is prepared for the disbelievers.
Quran [2:24]