"But in this crisis the Lord strengthened His people “with good words and comfortable words.” Zechariah 1:13 . Through an impressive illustration of the work of Satan and the work of Christ, He showed the power of their Mediator to vanquish the accuser of His people. PK 583.1"
"And the Lord answered the angel that talked with me with good words and comfortable words."
Ellen White directly references Zechariah 1:13 in this passage.
"In vision the prophet beholds “Joshua the high priest,” “clothed with filthy garments” ( Zechariah 3:1, 3 ), standing before the Angel of the Lord, entreating God's mercy in behalf of His afflicted people. As he pleads for the fulfillment of God's promises, Satan stands up boldly to resist him. He points to the transgressions of Israel as a reason why they should not be restored to the favor of God. He claims them as his prey, and demands that they be given into his hands. PK 583.2"
"And he shewed me Joshua the high priest standing before the angel of the Lord, and Satan standing at his right hand to resist him."
EGW directly quotes and interprets Zechariah 3:1.
"Now Joshua was clothed with filthy garments, and stood before the angel."
EGW directly quotes and interprets Zechariah 3:3.
"The high priest cannot defend himself or his people from Satan's accusations. He does not claim that Israel is free from fault. In filthy garments, symbolizing the sins of the people, which he bears as their representative, he stands before the Angel, confessing their guilt, yet pointing to their repentance and humiliation, and relying upon the mercy of a sin-pardoning Redeemer. In faith he claims the promises of God. PK 583.3"
"My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:"
Both passages deal with advocacy and the forgiveness of sins. EGW expands on the role of the high priest as a representative and the reliance on a Redeemer, which aligns with the concept of Jesus as an advocate in 1 John 2:1.
"Wherefore he is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them."
Both passages describe intercession, but the connection is not direct. Hebrews 7:25 speaks of Christ's intercession, while EGW interprets Zechariah 3 in light of intercession. The connection is thematic, but not a direct allusion.