Acts 9:20, Acts 18:5, Lk 4:16, Lk 24:27,44
As Paul went around the synagogue and explained the contents of the Old Testament he had read in the synagogue, he testified that Jesus was the Christ prophesied in the Old Testament. (Acts 17:1-3, Act 9:20, Acts 18:5,28)
Acts 17:1 Now when they had passed through Amphipolis and Apollonia, they came to Thessalonica, where was a synagogue of the Jews: 2 And Paul, as his manner was, went in unto them, and three sabbath days reasoned with them out of the scriptures, 3 Opening and alleging, that Christ must needs have suffered, and risen again from the dead; and that this Jesus, whom I preach unto you, is Christ.
Act 9:20 And straightway he preached Christ in the synagogues, that he is the Son of God.
Acts 18:5 And when Silas and Timotheus were come from Macedonia, Paul was pressed in the spirit, and testified to the Jews that Jesus was Christ. 28 For he mightily convinced the Jews, and that publicly, shewing by the scriptures that Jesus was Christ.
Jesus also went around the synagogue and explained the contents of the Old Testament, testifying that he was the Christ prophesied in the Old Testament. (Lk 4:16)
Lk 4:16 And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read.
The Old Testament speaks of Christ, and that Christ is Jesus. (Lk 24:27, 44)
Lk 24:27 And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself. 44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.