"The seventy weeks, or 490 years, especially allotted to the Jews, ended, as we have seen, in A.D. 34. At that time, through the action of the Jewish Sanhedrin, the nation sealed its rejection of the gospel by the martyrdom of Stephen and the persecution of the followers of Christ. Then the message of salvation, no longer restricted to the chosen people, was given to the world. The disciples, forced by persecution to flee from Jerusalem, “went everywhere preaching the word.” “Philip went down to the city of Samaria, and preached Christ unto them.” Peter, divinely guided, opened the gospel to the centurion of Caesarea, the God-fearing Cornelius; and the ardent Paul, won to the faith of Christ, was commissioned to carry the glad tidings “far hence unto the Gentiles.” Acts 8:4, 5 ; 22:21 . GC 328.1"
"Therefore they that were scattered abroad went every where preaching the word."
EGW quotes Acts 8:4 to support her claim about the disciples spreading the word after Stephen's martyrdom.
"there were 1810 days remaining. After the end of 490 days, the 1810 days were still to be fulfilled. From A.D. 34, 1810 years extend to 1844. Consequently the 2300 days of Daniel 8:14 terminate in 1844. At the expiration of this great prophetic period, upon the testimony of the angel of God, “the sanctuary shall be cleansed.” Thus the time of the cleansing of the sanctuary—which was almost universally believed to take place at the second advent—was definitely pointed out. GC 328.2"
"And he said unto me, Unto two thousand and three hundred days; then shall the sanctuary be cleansed."
Ellen White directly references Daniel 8:14 in this passage.