O Prophet! Lo! We have sent thee as a witness and a bringer of good tidings and a warner. And as a summoner unto Allah by His permission, and as a lamp that giveth light.   (33:45,46)
 
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. . . . . . . . . - (34:28)

Lo! We have sent thee (O Muhammad) as a witness and a bearer of good tidings and a warner,  That ye (mankind) may believe in Allah and His messenger, and may honour Him, and may revere Him, and may glorify Him at early dawn and at the close of day. - (48 :8,9)

And We have sent thee (O Muhammad) only as a bearer of good tidings and a warner.  - (25:56)

He it is Who hath sent His messenger with the guidance and the Religion of Truth, that He may cause it to prevail over all religion, however much the idolaters may be averse.  - (9:33)

Muhammad is not the father of any man among you, but he is the messenger of Allah and the Seal of the Prophets; and Allah is ever Aware of all things. - (33:40)