The Prohibition - 66:4
If you both repent to Allah, your hearts will be turned. And if you support one another against him (the Messenger), Allah is his guardian, and Jibril and the righteous believers and the angels support him.
The believers support the messenger:
The Women/4:83
If a rumor reaches them about security or danger, they spread it. If they had conveyed it to the messenger and the authorities among them, their experts would have evaluated it. Had it not been for the grace and mercy of Allah upon you, you would have followed Satan except a few of you.
The Women/4:84
You must fight in the way of Allah. You are responsible only for yourself. Encourage the believers to do the same so that Allah may neutralize the power of the disbelievers. Allah´s power is more severe and His punishment is more severe.
The Spoils of War/8:62
If they seek to deceive you, Allah is sufficient for you. He has supported you with His help and with those who believe.
The Repentance/9:99
Among the Arabs are those who believe in Allah and the Last Day. And they consider what they spend as a means to draw near to Allah and support for the messenger. Indeed it is for them a means of approach. Allah will admit them into His mercy. Allah is Forgiving, Merciful.
The Repentance/9:103
Take alms from their money to purify them and glorify them, and encourage them and support them, for your support pleases them. Allah is All-Hearing, All-Knowing.