"Facing King Ahab and the false prophets, and surrounded by the assembled hosts of Israel, Elijah stands, the only one who has appeared to vindicate the honor of Jehovah. He whom the whole kingdom has charged with its weight of woe is now before them, apparently defenseless in the presence of the monarch of Israel, the prophets of Baal, the men of war, and the surrounding thousands. But Elijah is not alone. Above and around him are the protecting hosts of heaven, angels that excel in strength. PK 147.1"
"And he answered, Fear not: for they that be with us are more than they that be with them."
While not a direct quote, the passage in PK shares a strong thematic parallel with 2 Kings 6:16. Both passages highlight the presence of unseen heavenly hosts protecting God's servants in the face of overwhelming opposition.
"Unashamed, unterrified, the prophet stands before the multitude, fully aware of his commission to execute the divine command. His countenance is lighted with an awful solemnity. In anxious expectancy the people wait for him to speak. Looking first upon the broken-down altar of Jehovah, and then upon the multitude, Elijah cries out in clear, trumpetlike tones, “How long halt ye between two opinions? if the Lord be God, follow Him: but if Baal, then follow him.” PK 147.2"
"And Elijah came unto all the people, and said, How long halt ye between two opinions? if the Lord be God, follow him: but if Baal, then follow him. And the people answered him not a word."
EGW directly quotes 1 Kings 18:21.
"The people answer him not a word. Not one in that vast assembly dare reveal loyalty to Jehovah. Like a dark cloud, deception and blindness had overspread Israel. Not all at once had this fatal apostasy closed about them, but gradually, as from time to time they had failed to heed the words of warning and reproof that the Lord sent them. Each departure from rightdoing, each refusal to repent, had deepened their guilt and driven them farther from Heaven. And now, in this crisis, they persisted in refusing to take their stand for God. PK 147.3"
"And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not. Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, and be healed."
The EGW passage describes the spiritual blindness of Israel, which is a theme present in Isaiah 6:9-10, where God instructs Isaiah to preach to a people who will not understand. The connection is not a direct quote, but a thematic resonance.