"This was John's testimony when the Jews sent priests and Levites to him from Jerusalem to ask him, "Who are you?"
"He spoke openly and, remaining true to himself, admitted, "I am not the Messiah."
"So they asked him, "Well then, are you Elijah?" John said, "I am not." "Are you the Prophet?" He answered, "No."
The explaination of this verse is these which we say are Muhammad (peace and blessings of Allah be upon him)!
The peoples testement says, "1:20,21 He confessed, etc. Some conjectured that John was the expected Christ; others that he was Elijah who was first to come (Mal 4:5); others that he was that prophet, the one predicted by Moses (De 18:15); but he declared that he was none of these."
"Your LORD your God will raise up for you a prophet like me from among you, from your countrymen, you shall listen to him."
'I will raise up a prophet from among their countrymen like you, and I will put My words in his mouth, and he shall speak to them all that I command him.
"Then they said to him, "Who are you? We must give an answer to those who sent us. What do you say about yourself?"
"They asked him, and said to him, "Why then are you baptizing, if you are not the Christ, nor Elijah, nor the Prophet?"
This indicates that there was another Prophet to come and was Muhammad known as THE Prophet.