"Chapter 13—Days of Preparation This chapter is based on Acts 9:19-30 . After his baptism, Paul broke his fast and remained “certain days with the disciples which were at Damascus. And straightway he preached Christ in the synagogues, that He is the Son of God.” Boldly he declared Jesus of Nazareth to be the long-looked-for Messiah, who “died for our sins according to the Scriptures; ... was buried, and ... rose again the third day,” after which He was seen by the Twelve and by others. “And last of all,” Paul added, “He was seen of me also, as of one born out of due time.” 1 Corinthians 15:3, 4, 8 . His arguments from prophecy were so conclusive, and his efforts were so manifestly attended by the power of God, that the Jews were confounded and unable to answer him. AA 123"
"And straightway he preached Christ in the synagogues, that he is the Son of God."
The EGW passage directly quotes and references Acts 9:20, making a clear and intentional connection.
"And when he had received meat, he was strengthened. Then was Saul certain days with the disciples which were at Damascus. And straightway he preached Christ in the synagogues, that he is the Son of God. But all that heard him were amazed, and said; Is not this he that destroyed them which called on this name in Jerusalem, and came hither for that intent, that he might bring them bound unto the chief priests? But Saul increased the more in strength, and confounded the Jews which dwelt at Damascus, proving that this is very Christ. And after that many days were fulfilled, the Jews took counsel to kill him: But their laying await was known of Saul. And they watched the gates day and night to kill him. Then the disciples took him by night, and let him down by the wall in a basket. And when Saul was come to Jerusalem, he assayed to join himself to the disciples: but they were all afraid of him, and believed not that he was a disciple. But Barnabas took him, and brought him to the apostles, and declared unto them how he had seen the Lord in the way, and that he had spoken to him, and how he had preached boldly at Damascus in the name of Jesus. And he was with them coming in and going out at Jerusalem. And he spake boldly in the name of the Lord Jesus, and disputed against the Grecians: but they went about to slay him. Which when the brethren knew, they brought him down to Cesarea, and sent him forth to Tarsus."
Ellen White directly references Acts 9:19-30 in this passage.