You need to remember that the Jews had more than just the Old Testament scrolls.  They had the Mishnah and the Talmud writings that the Scribes and Pharisees used to teach the Jewish people what the Word of God said and meant.  So while the prophecies might not be in the Old Testament, they might have been in either the Mishnah or Talmud writings. 

We are not sure so we need to research and find out. 



 

“It is a necessary basic assumption of biblical interpretation that attention to the plain meaning of the text is the door to healthy understanding of the Bible.” (Paul S.Karleen Ph.D.)