1. allah, the exalted, says:

(muhammad is not the father of any of your men, but (he is) the messenger of allah, and the last of the prophets: and allah has full knowledge of all things.) (33:40)

2. eesa, may allah exalt his mention, gave the glad tidings of prophet muhammad in the gospel. allah, the exalted, says:

(and remember, jesus, the son of mary, said: "o children of israel! i am the messenger of allah (sent) to you, confirming the law (which came) before me, and giving glad tidings of a messenger to come after me, whose name shall be ahmad." but when he came to them with clear signs they said, 'this is evident sorcery!')  (61:6)