There is a good number of prophecies in the Holy scriptures about the ProphetMuhammad, among these is the seal of prophethood:
There are a lot of signs and prophecies and glad tiding about the prophet,
In Isaiah 9:6:
" For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counseller, The mighty God, The everlasting Father, The Prince of Peace.( Isaiah 9:6)
Also, there is another reference in "(John:6:27)
" Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life, which the Son of man shall give unto you: for him hath God the Father sealed. "(John:6:27)
Despite the two verses refer to a physical sign, the Christian scholars, as usual, say that these two prophecies refer to immaterial sign that they claim they discusses Jesus. These two signs cannot fit Jesus because he wasn't given any government over any one, the Holy Book says that Jesus rejected any mundane authority as stated in (John-18:36)
The Dead Sea scroll supports the Muslim claim
There is a third reference in The Dead Sea Scroll (Seper Assap,1:24), discovered in 1947 and written one century before Jesus' birth , talking about the molar, it says "…Some are like the lentil seeds "
The same fact is stressed in one of the ancient Jewish Holy Book (Seper Assap) some are like the lentil seeds and others are like the cucumber seeds
Evidence to alterations in the Isaiah( 9-6)
It is well-established that the Holy Book has undergone many changes in words and sentences; some were removed, others were added, some were replaced, some lines were moved from its original place to another and this left many verses in the Holy Book questionable.
This is clear in the writings of the ancient Moslem scholars who studied the Holy Book , they quoted some verses that are no longer found in the Holy Book. Ali Tabari, for example, says that the verse ("(John:6:27)
says in Hebrew that:
"The sign of prophecy is on his shoulder." (Ali Tabari, The Religion and the Empire, trans. Mingana, pp. 95)