"Chapter 22—Thessalonica This chapter is based on Acts 17:1-10 . After leaving Philippi, Paul and Silas made their way to Thessalonica. Here they were given the privilege of addressing large congregations in the Jewish synagogue. Their appearance bore evidence of the shameful treatment they had recently received, and necessitated an explanation of what had taken place. This they made without exalting themselves, but magnified the One who had wrought their deliverance. AA 221"
"Now when they had passed through Amphipolis and Apollonia, they came to Thessalonica, where was a synagogue of the Jews: And Paul, as his manner was, went in unto them, and three sabbath days reasoned with them out of the scriptures, 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. And some of them believed, and consorted with Paul and Silas; and of the devout Greeks a great multitude, and of the chief women not a few. But the Jews which believed not, moved with envy, took unto them certain lewd fellows of the baser sort, and gathered a company, and set all the city on an uproar, and assaulted the house of Jason, and sought to bring them out to the people. And when they found them not, they drew Jason and certain brethren unto the rulers of the city, crying, These that have turned the world upside down are come hither also; Whom Jason hath received: and these all do contrary to the decrees of Cesar, saying that there is another king, one Jesus. And they troubled the people and the rulers of the city, when they heard these things. And when they had taken security of Jason, and of the other, they let them go. And the brethren immediately sent away Paul and Silas by night unto Berea: who coming thither went into the synagogue of the Jews."
EGW explicitly states that the chapter is based on Acts 17:1-10 and summarizes the events described in those verses.
"In preaching to the Thessalonians, Paul appealed to the Old Testament prophecies concerning the Messiah. Christ in His ministry had opened the minds of His disciples to these prophecies; “beginning at Moses and all the prophets, He expounded unto them in all the Scriptures the things concerning Himself.” Luke 24:27 . Peter in preaching Christ had produced his evidence from the Old Testament. Stephen had pursued the same course. And Paul also in his ministry appealed to the scriptures foretelling the birth, sufferings, death, resurrection, and ascension of Christ. By the inspired testimony of Moses and the prophets he clearly proved the identity of Jesus of Nazareth with the Messiah and showed that from the days of Adam it was the voice of Christ which had been speaking through patriarchs and prophets. AA 221.2"
"And beginning at Moses and all the prophets, he expounded unto them in all the scriptures the things concerning himself."
EGW directly quotes Luke 24:27 and discusses how Paul, like Christ, Peter, and Stephen, used Old Testament prophecies to preach about the Messiah.