According to the Qu'ran, Muhameed is a false prophet because past the revelation he received contradicts revelations of the past. God prophecies and forewarns, He does not edit. Now, what does the Holy Bible have to say about Muhammed being the SEAL?
"I have testimony weightier than that of John. For the very work that the Father has given me to finish, and which I am doing, testifies that the Father has sent me. And the Father who sent me has himself testified concerning me. You have never heard his voice nor seen his form, nor does his word dwell in you, for you do not believe the one he sent." John 5:36-38
"But if I do judge, my decisions are right, because I am not alone. I stand with the Father, who sent me. In your own Law it is written that the testimony of two men is valid. I am one who testifies for myself; my other witness is the Father, who sent me." John 8:16-18
"Why then do you accuse me of blasphemy because I said, ‘I am God’s Son’? Do not believe me unless I do what my Father does. But if I do it, even though you do not believe me, believe the miracles, that you may know and understand that the Father is in me, and I in the Father." John 10:36-38
"Jesus answered: ‘Don’t you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, "Show us the Father"? Don’t you believe that I am in the Father, and that the Father is in me? The words I say to you are not just my own. Rather, it is the Father, living in me, who is doing his work. Believe me when I say that I am in the Father and the Father is in me; or at least believe on the evidence of the miracles themselves.’" John 14:9-11
"He then began to speak to them in parables: ‘A man planted a vineyard. He put a wall around it, dug a pit for the winepress and built a watchtower. Then he rented the vineyard to some farmers and went away on a journey. At harvest time he sent a servant to the tenants to collect from them some of the fruit of the vineyard. But they seized him, beat him and sent him away empty-handed. Then he sent another servant to them; they struck this man on the head and treated him shamefully. He sent still another, and that one they killed. He sent many others; some of them they beat, others they killed. HE HAD ONE LEFT TO SEND, A SON, WHOM HE LOVED. He sent him LAST OF ALL, saying, "They will respect my son." But the tenants said to one another, "THIS IS THE HEIR. Come, let's kill him, and the inheritance will be ours." So they took him and killed him, and threw him out of the vineyard.’" Mark 12:1-8
"When I saw him, I fell at his feet as though dead. Then he placed his right hand on me and said: 'Do not be afraid. I am the First and the Last. I am the Living One; I was dead, and behold I am alive for ever and ever! And I hold the keys of death and Hades.'" Revelation 1:17-18
God said in the Old Testament: "This is what the LORD says - Israel's King and Redeemer, the LORD Almighty: I am the first and I am the last; apart from me there is no God." Isaiah 44:6
"In the past God spoke to our forefathers through the prophets at many times and in various ways, BUT IN THESE LAST DAYS HE HAS SPOKEN TO US BY HIS SON, whom he appointed heir of all things, and through whom he made the universe. The Son is the radiance of God's glory and the exact representation of his being, sustaining all things by his powerful word. After he had provided purification for sins, he sat down at the right hand of the Majesty in heaven." Hebrews 1:1-3
"While I was speaking and praying, confessing my sin and the sin of my people Israel and making my request to the LORD my God for his holy hill - while I was still in prayer, Gabriel, the man I had seen in the earlier vision, came to me in swift flight about the time of the evening sacrifice. He instructed me and said to me, 'Daniel, I have now come to give you insight and understanding. As soon as you began to pray, an answer was given, which I have come to tell you, for you are highly esteemed. Therefore, consider the message and understand the vision: 'Seventy "sevens" are decreed for your people and your holy city to FINISH transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, TO SEAL UP VISION AND PROPHECY and to anoint the most holy. Know and understand this: From the issuing of the decree to restore and rebuild Jerusalem until the Anointed One (Messiah), the ruler, comes, there will be seven "sevens," and sixty-two "sevens." It will be rebuilt with streets and a trench, but in times of trouble. After the sixty-two "sevens," the Anointed One (Messiah) will be CUT OFF and will have nothing. The people of the ruler who will come will destroy the city and the sanctuary. The end will come like a flood: War will continue until the end, and desolations have been decreed.'" Daniel 9:20-26