Some quote John 15:26 and claim that the ‘comforter’ is Muhammad. Let’s read few parallel verse and we can see who this ‘comforter’ is.
Joh 15:26 But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth, which proceedeth from the Father, he shall testify of me:
You see, the comforter is Spirit, which proceedeth from the Father (Allah). Muhammad not a ‘Spirit’ proceedeth from Allah.
Joh 14:16 And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;
Muhammad not ‘abide’ in us
Joh 14:17 Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.
We know and saw Muhammad and he did not ‘dwelleth’ in us neither he is in us.
Joh 14:26 But the Comforter, which is the Holy Ghost, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
Again, Muhammad is not a Holy Ghost but human beings.
Act 2:3 And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
Act 2:4 And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.
Not Muhammad neither Gabriel who deliver the Quran to Muhammad ‘appeared unto us cloven tongues like as of fire’. And I never read or heard a Muslim filled with the Holy Ghost and began to speak with other tongues, as the Spirit gave them utterance.
So, obviously the ‘Comforter’ which is the Bible talking about is not Muhammad.