"The Minister and Manual Work While Paul was careful to set before his converts the plain teaching of Scripture regarding the proper support of the work of God, and while he claimed for himself, as a minister of the gospel, the “power to forbear working” [ 1 Corinthians 9:6 .] at secular employment as a means of self-support, yet at various times during his ministry in the great centers of civilization, he wrought at a handicraft for his own maintenance.... GW 234"
"Or I only and Barnabas, have not we power to forbear working?"
The EGW passage directly quotes and references 1 Corinthians 9:6, making it an explicit allusion.
"It is at Thessalonica that we first read of Paul's working with his hands in self-supporting labor while preaching the word. Writing to the church of believers there, he reminded them that he “might have been burdensome” to them, and added” “Ye remember, brethren, our labor and travail: for laboring night and day, because we would not be chargeable unto any of you, we preached unto you the gospel of God.” [ 1 Thessalonians 2:6, 9 .] And again, in his second epistle to them, he declared that he and his fellow-laborers while with them had not eaten “any man's bread for naught.” Night and day we worked, he wrote, “that we might not be chargeable to any of you: not because we have not power, but to make ourselves an ensample unto you to follow us.” [ 2 Thessalonians 3:8, 9 .] ... GW 234.2"
"For ye remember, brethren, our labour and travail: for labouring night and day, because we would not be chargeable unto any of you, we preached unto you the gospel of God."
EGW directly quotes 1 Thessalonians 2:9.
"Neither did we eat any man’s bread for nought; but wrought with labour and travail night and day, that we might not be chargeable to any of you:"
EGW directly quotes 2 Thessalonians 3:8.