"Though the rulers of this world know it not, yet often in their councils angels have been spokesmen. Human eyes have looked upon them; human ears have listened to their appeals; human lips have opposed their suggestions and ridiculed their counsels; human hands have met them with insult and abuse. In the council hall and the court of justice these heavenly messengers have shown an intimate acquaintance with human history; they have proved themselves better able to plead the cause of the oppressed than were their ablest and most eloquent defenders. They have defeated purposes and arrested evils that would have greatly retarded the work of God and would have caused great suffering to His people. In the hour of peril and distress “the angel of the Lord encampeth round about them that fear Him, and delivereth them.” Psalm 34:7 . GC 632.1"
"The angel of the Lord encampeth round about them that fear him, and delivereth them."
Ellen White directly references Psalms 34:7 in this passage.
"With earnest longing, God's people await the tokens of their coming King. As the watchmen are accosted, “What of the night?” the answer is given unfalteringly, “‘The morning cometh, and also the night.’ Isaiah 21:11, 12 . Light is gleaming upon the clouds above the mountaintops. Soon there will be a revealing of His glory. The Sun of Righteousness is about to shine forth. The morning and the night are both at hand—the opening of endless day to the righteous, the settling down of eternal night to the wicked.” GC 632.2"
"The burden of Dumah. He calleth to me out of Seir, Watchman, what of the night? Watchman, what of the night?"
EGW directly quotes Isaiah 21:11,12 and uses it as a basis for her commentary on the state of the world and the coming of Christ.