6-84
And We granted him Ishaq and Yaqub, each did We guide, and earlier We had guided Nuh and from his descendants Dawood and Sulaiman and Ayub and Yusuf and Musa and Harun and thus do We reward those who do good,
A list of prophets whom Allah (SWT) had guided is given and human beings are ordered to follow religion in accordance with their guidance. The Quran is the final Divine reminder for mankind till the end of the world and Prophet Muhammed (PBH) the last Prophet. Therefore human beings will have to follow religion in accordance with the instructions given in the Quran and by Prophet Muhammed (PBH).
6-91
And they did not estimate Allah with the estimation due to Him when they said, “”Allah did not send down anything on man.”” Say, “”Who (then) sent down the book with which Musa had come, (in which there was) light and guidance for mankind, of which you have made (written) pages, (part of) which you manifest while you hide much, and (through which) you were taught that which you did not know, you and your forefathers?”” Say, “”Allah,”” then leave them sporting in their involvement (of vain talk).
People probably commented that it was not possible for Muhammed (PBH), a man, to receive the Quran from Allah (SWT). Therefore they are asked as to who had revealed the Torah to Musa (PBH). Then it is clarified that the Quran, confirming earlier Divine revelations was revealed by Allah (SWT), first to warn the Makkans and later to its surroundings extending to the whole world as Makkah is more or less centrally located with respect to all the continents.
6-93
And who is more unjust than he who forges a lie against Allah or says, “”Communication has come to me,”” when he has not been communicated with anything, and he who says, “”I can (also) bring down the like of that which Allah has sent down.”” Could you but see when the unjust are engulfed in (the sufferings of) death and the angels stretch their hands (saying), “”Bring out your souls. (This) day you will be rewarded with a shameful punishment because you used to speak about Allah (something) other than the truth, and you used to consider yourselves great with regard to (the acceptance) of His signs.””
Those who falsely claim that Divine communication has come to us or claim that they too can bring down a book like the Quran are warned of the evil consequences.
6-95
(It is) certainly Allah Who splits the grain and the date-stone (seed). He brings out the living from the dead and He brings out the dead from the living. That is Allah, then how are you turned away (from the truth)?
Allah (SWT) gives a list of some of His works as signs for His existence and powers. He has even fixed the place and time of our stay here and the place and time of our death.