"Turn to the Lord, ye prisoners of hope. Seek strength from God, the living God. Show an unwavering, humble faith in His power and His willingness to save. From Christ is flowing the living stream of salvation. He is the Fountain of life, the Source of all power. When in faith we take hold of His strength, He will change, wonderfully change, the most hopeless, discouraging outlook. He will do this for the glory of His name. 8T 12.1"
"Turn you to the strong hold, ye prisoners of hope: even to day do I declare that I will render double unto thee;"
The EGW passage directly quotes and expands upon the phrase 'prisoners of hope' from Zechariah 9:12, making it a clear allusion.
"God calls upon His faithful ones, who believe in Him, to talk courage to those who are unbelieving and hopeless. May the Lord help us to help one another and to prove Him by living faith. 8T 12.2"
"Wherefore comfort yourselves together, and edify one another, even as also ye do."
Both passages encourage mutual support and encouragement among believers. The EGW passage speaks of 'talk[ing] courage to those who are unbelieving and hopeless' and helping 'one another,' which aligns with the Thessalonians verse about comforting and edifying one another.
"***** “It is a good thing to give thanks unto the Lord, and to sing praises unto Thy name, O Most High: to show forth Thy loving-kindness in the morning, and Thy faithfulness every night, upon an instrument of ten strings, and upon the psaltery; upon the harp with a solemn sound. For Thou, Lord, hast made me glad through Thy work: I will triumph in the works of Thy hands.” Psalm 92:1-4 . 8T 12.4"
"It is a good thing to give thanks unto the Lord, and to sing praises unto thy name, O most High: To shew forth thy lovingkindness in the morning, and thy faithfulness every night, Upon an instrument of ten strings, and upon the psaltery; upon the harp with a solemn sound. For thou, Lord, hast made me glad through thy work: I will triumph in the works of thy hands."
Ellen White directly references Psalms 92:1-4 in this passage.