The Holy Quran says:
It is He who has sent to the unlettered people an apostle from among themselves, reciting to them and teaching them the Book and wisdom, although they were before in manifest error. (Quran, 62:2)

Also The Holy Quran says:
We have sent down to you the Book in truth, confirming that of the scriptures which was revealed before it and safeguarding it..... (Quran, 5:48)

And We have not sent thee (O Muhammad) save as a bringer of good tidings and a warner unto all mankind; but most of mankind know not. (Quran, 34:28)

The Noble Messenger of Allah (s.a.w.) said:
"Surely he is not a Muslim who does not take interest in the affairs of Muslims. And surely he is not a Muslim who hears a Muslim calling for help and does not respond to his call."

ARTICLES ABOUT THE HOLY PROPHET