[Michaelnewerb]

Many groups of muslims claim that Beloved Prophet (pbuh) does not have knowledge of the unseen.

Ahlus-Sunna wal Jam'ah believe that Allah has given the knowledge of the unseen to the Prophet (may Allah bless him and grant him peace), and that it is also permissable to say that our Prophet (may Allah bless him and grant him peace) knows the knowledge of the Unseen. However, let us make one thing clear. It is NOT permissible to say that Prophet's knowledge of unseen is equal or greater than that of Allah's knowledge. Allah is our creator and sustainer, he has knowledge over all of creation including Prophet. So that distinction must be made clear.

Now you want proof?

It is in the Quran and Hadith.

1. Allah Subhan Wa Taalah says in Quran:
"He (alone) knows the Unseen, nor does He make any one acquainted with His Mysteries Except an apostle whom He has chosen: and then He makes a band of watchers march before him and behind him" (72:26/27)

2. Allah Subhan Wa Taalah says in Qur'an:
Allah has sent down to you the Book and Wisdom and has taught to you what you did not know, and great is the grace of Allah upon you" [Sura an-Nisa, verse 113]

3. Allah Subhan Wa Taalah says in the Qur'an:
"These are the tidings of the Unseen that We reveal to you in secret"
[Sura al-Imran, verse 44]

"Nor will He disclose to you the secrets of the Unseen. But He chooses of His Apostles [for the purpose]"
[Sura al-Imran, verse 179]

Hadith No.1
Narrated 'Umar:
One day the Prophet stood up amongst us for a long period and informed us about the beginning of creation (and talked about everything in detail) till he mentioned how the people of Paradise will enter their places and the people of Hell will enter their places. Some remembered what he had said, and some forgot it.

Reference
►Sahih Bukhari Volume 4, Book 54, Number 414

Hadith No.2
Narrated by Anas bin Malik:
The Prophet once climbed the mountain of Uhud with Abu Bakr, 'Umar and 'Uthman. The mountain shook with them. The Prophet said (to the mountain), "Be firm, O Uhud! For on you there are no more than a Prophet, a Siddiq and two martyrs."
Reference
►Sahih Bukhari Volume 5 Number 24.

Hadith No.3
Hudhaifa reported that:
Allah's Messenger (may peace be upon him) stood before us one day and he did not leave anything unsaid (that he had to say) at that very spot which would happen (in the shape of turmoil) up to the Last Hour. Those who had to remember them preserved them in their minds and those who could not remember them forgot them. My friends knew them and there are certain things which slip out of my mind, but I recapitulate them when anyone makes a mention of them just as a person is lost from one's mind but is recalled to him on seeing his face.

Reference
►Sahih Muslim The Book Pertaining to the Turmoil and Portents of the Last Hour (Kitab Al-Fitan wa Ashrat As-Sa`ah) Book 041, Number 6909


Anyone whosever rejects that Prophet (pbuh) has knowledge of the unseen, after having seen evidence from Quran and Hadith, than may Allah guide you.
I haven't even provided references from renowned scholars yet and have already proved Prophet (pbuh) has knowledge of unseen, it doesn't take much intellect to realize that.