Paul said that he proclaimed what the prophets had written about the Messiah.

Acts 26:21-23

21 “It is because I preached this message that some [SYN] Jews seized me when I was in the Temple courtyard and tried to kill me. 22 However, God has been helping me from that time, and he is still helping me today. So I stand here and I tell all of you people, those who are important and those who are not, who Jesus is. Everything that I say about him is what Moses and the other prophets wrote about long ago, things that they said would happen. 23 They wrote that people would cause the Messiah to suffer and die. They also wrote that he would be the first person to become alive again, to proclaim the message that would be like light, that he would save both his own Jewish people and non-Jewish people.”