"When his disciples heard it, they were exceedingly amazed, saying, Who then can be saved? But Jesus beheld them, and said unto them, With men this is impossible; but with God all things are possible. Then answered Peter and said unto him, Behold, we have forsaken all, and followed thee; what shall we have therefore? And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel. And every one that hath forsaken houses, or brethren, or sisters, or father, or mother, or wife, or children, or lands, for my name's sake, shall receive an hundredfold, and shall inherit everlasting life. But many that are first shall be last; and the last shall be first." (Matthew 19:25-30)
This one is very simple. Jesus (Pbuh) is alleged here to be speaking to all twelve of his apostles and telling all twelve of them that they shall sit on twelve thrones judging the tribes of Israel on the Day of Resurrection. So, the logical question becomes: who are these twelve who he is addressing? Let us ask the same "Gospel of Luke" and see what it says:
"And when it was day, he called unto him his disciples: and of them he chose twelve, whom also he named apostles; Simon, (whom he also named Peter,) and Andrew his brother, James and John, Philip and Bartholomew, Matthew and Thomas, James the son of Alphaeus, and Simon called Zelotes, And Judas the brother of James, and Judas Iscariot, which also was the traitor." (Luke 6:13-16)
So, according to the gospel of Luke, Jesus (pbuh) allegedly promised the traitor Judas that he has a throne reserved for him in heaven. Not only that, but he shall sit on this throne judging the twelve tribes of Israel on that day. It is obvious that Judas is included because Jesus says "YOU shall ..." In other words he is addressing the twelve men who are standing before him. He also explicitly mentions the word "twelve thrones." The twelfth can not be "St. Paul", the self-appointed replacement for Judas, since Jesus (pbuh) never met Paul. So Paul was not present in this meeting where Jesus addressed all of his apostles and told them that "THEY" shall judge Israel from twelve thrones.
Once again, the tampering fingers have left their mark.