Read the Quran

Then do they not reflect upon the Qur’ān?1 If it had been from [any] other than Allāh, they would have found within it much contradiction. [Quran 4:82]

We have revealed to you ˹O Prophet˺ this Book with the truth, as a confirmation of previous Scriptures and a supreme authority on them. So judge between them by what Allah has revealed, and do not follow their desires over the truth that has come to you. [Quran 5:48]

It is not ˹possible˺ for this Quran to have been produced by anyone other than Allah. In fact, it is a confirmation of what came before (i.e. Torah and Gospel), and an explanation of the Scripture. It is, without a doubt, from the Lord of all worlds. [Quran 10:37]

O you who were given the Scripture (Gospel, Torah), believe in what We have sent down [to Prophet Muḥammad (ﷺ)], confirming your own scriptures [Quran 4:47]

So woe to those who write the "scripture" with their own hands, then say, "This is from Allāh," in order to exchange it for a small price. Woe to them for what their hands have written and woe to them for what they earn. [Quran 2:79]

And We send down of the Quran that which is healing and mercy for the believers, but it does not increase the wrongdoers except in loss. [Quran 17:82]

O mankind, there has come to you instruction from your Lord and healing for what is in the breasts and guidance and mercy for the believers.     [Quran 10:57]

Indeed, it is We who sent down the message [i.e., the Qur’ān], and indeed, We will be its guardian.    [Quran 15:9]