Inventing Things about Allah

Who is more unjust than one who fabricates lies against Allah or claims, “I have received revelation,” when no revelation was given to him? Or one who says, “I will reveal something like what Allah has revealed”?

6:93Who is guilty of more wrong than he who forgeth a lie against Allah, or saith: I am inspired, when he is not inspired in aught; and who saith: I will reveal the like of that which Allah hath revealed? If thou couldst see, when the wrong-doers reach the pangs of death and the angels stretch their hands out (saying): Deliver up your souls. This day ye are awarded doom of degradation for that ye spake concerning Allah other than the truth, and used to scorn His portents.

7:37Who doeth greater wrong than he who inventeth a lie concerning Allah or denieth Our tokens. (For such) their appointed portion of the Book (of destiny) reacheth them till, when Our messengers come to gather them, they say: Where (now) is that to which ye cried beside Allah? They say: They have departed from us. And they testify against themselves that they were disbelievers.