"Muhammad is not the father of any of your men, but he is the Messenger of ALLAH and the Seal of the Prophets, and ALLAH has knowledge of everything". ( 33 : 40 ) Al-Quran.
Also:
"Those who have made divisions in their religion and have become sects, thou art not of them in anything; their affair is only unto ALLAH, and He will tell them what they have been doing". ( 6 : 160 ) Al-Quran.
"They only forge falsehood who do not believe in the Signs of ALLAH, and they are the liars". ( 16 : 105 ) Al-Quran.
"...Today I have perfected your religion for you, and I have completed My blessing on you, and I am pleased to make Submission (Islam) your religion...". ( 5 : 3 ) Al-Quran.
"And We have sent no Messenger but in the language of his people, that he may make all clear to them; then ALLAH sends astray whom He will, and guides whom He will; and He is the Mighty, the Wise". ( 14 : 4 ) Al-Quran.
"It is not fitting for a Believer, man or woman, when a matter has been decided by ALLAH and His Messenger to have any option about their decision: if any one disobeys ALLAH and His Messenger, he is indeed on a clearly wrong Path". ( 33 : 36 ) Al-Quran.
"We sent no messenger save that he should be obeyed by ALLAH's leave. And if, when they had wronged themselves, they had but come unto thee and asked forgiveness of ALLAH, and asked forgiveness of the messenger, they would have found ALLAH Forgiving, Merciful. But nay, by thy Lord, they will not believe (in truth) until they make thee judge of what is in dispute between them and find within themselves no dislike of that which thou decidest, and submit with full submission". ( 4 : 64-65 ) Al-Quran.
"O ye who believe! Obey ALLAH, and obey the Messenger, and those charged with authority among you. If ye differ in anything among yourselves, refer it to ALLAH and His Messenger, if ye do believe in ALLAH and the Last Day: That is best, and most suitable for final determination". ( 4 : 59 ) Al-Quran.
"Had We sent this as a Quran (in a language) other than Arabic they would have said: "Why are not its verses explained in detail? What! (a Book) not in Arabic and (a Messenger) an Arab?" Say: "It is a guide and a healing to those who believe; and for those who believe not there is a deafness in their ears and it is blindness in their (eyes); they are (as it were) being called from a place far distant!". ( 41 : 44 ) Al-Quran.
"Who doth more wrong than such as forge a lie against ALLAH or deny His Signs? But never will prosper those who sin". ( 10 : 60 ) Al-Quran.
"Those who believe not in the Signs of ALLAH, ALLAH will not guide them and theirs will be a grievous Penalty". ( 16 : 104 ) Al-Quran.
"Therefore give admonition in case the admonition profits (the hearer). The admonition will be received by those who fear (ALLAH): But it will be avoided by those most unfortunate ones. Who will enter the Great Fire In which they will then neither die nor live". ( 87 : 9-13 ) Al-Quran.