We sent no messenger except to be obeyed by Allah's permission. If only when they wronged themselves they had come to you and asked Allah's forgiveness and the Messenger had asked forgiveness for them they would have found Allah Ever-Returning, Most Merciful. (Surat an-Nisa': 64)
Whoever obeys Allah and the Messenger will be with those whom Allah has blessed: the prophets and steadfast affirmers of truth, the martyrs and righteous. What excellent company such people are! (Surat an-Nisa': 69)
Whoever obeys the Messenger has obeyed Allah. If anyone turns away, we did not send you to them as their keeper. (Surat an-Nisa': 80)
Those who pledge you their allegiance pledge allegiance to Allah. Allah's hand is over their hands. He who breaks his pledge only breaks it against himself. But as for him who fulfils the contract he has made with Allah, We will pay him an immense reward. (Surat al-Fath: 10)
When news of any matter reaches them they spread it about, whether it is of a reassuring or disquieting nature. If they had only referred it to the Messenger and those in command among them, those among them able to discern the truth about it would have had proper knowledge of it. If it were not for Allah's favor to you and His mercy, all but a very few of you would have followed Satan. (Surat an-Nisa': 83)
No, by your Lord, they are not believers until they make you their judge in the disputes that break out between them, and then find no resistance within themselves to what you decide and submit themselves completely. (Surat an-Nisa': 65)
Among them are some who insult the Prophet, saying he is only an ear [only a hearer]. Say, "An ear of good for you, believing in Allah and believing in the believers, and a mercy for those among you who believe." As for those who insult the Messenger of Allah, they will have a painful punishment. (Surat at-Tawba: 61)