"Moses and Aaron were directed to visit the riverside next morning, where the king was accustomed to repair. The overflowing of the Nile being the source of food and wealth for all Egypt, the river was worshiped as a god, and the monarch came thither daily to pay his devotions. Here the two brothers again repeated the message to him, and then they stretched out the rod and smote upon the water. The sacred stream ran blood, the fish died, and the river became offensive to the smell. The water in the houses, the supply preserved in cisterns, was likewise changed to blood. But “the magicians of Egypt did so with their enchantments,” and “Pharaoh turned and went into his house, neither did he set his heart to this also.” For seven days the plague continued, but without effect. PP 265.1"
"And Moses and Aaron did so, as the Lord commanded; and he lifted up the rod, and smote the waters that were in the river, in the sight of Pharaoh, and in the sight of his servants; and all the waters that were in the river were turned to blood."
EGW directly recounts the event described in Exodus 7:20, including specific details like the river turning to blood and the magicians' imitation. This is a clear and direct allusion.
Again the rod was stretched out over the waters, and frogs came up from the river and spread over the land. They overran the houses, took possession of the bed chambers, and even the ovens and kneading troughs. The frog was regarded as sacred by the Egyptians, and they would not destroy it; but the slimy pests had now become intolerable. They swarmed even in the palace of the Pharaohs, and the king was impatient to have them removed. The magicians had appeared to produce frogs, but they could not remove them. Upon seeing this, Pharaoh was somewhat humbled. He sent for Moses and Aaron, and said, “Entreat the Lord, that He may take away the frogs from me, and from my people; and I will let the people go, that they may do sacrifice unto the Lord.” After reminding the king of his former boasting, they requested him to appoint a time when they should pray for the removal of the plague. He set the next day, secretly hoping that in the interval the frogs might disappear of themselves, and thu…
"And Aaron stretched out his hand over the waters of Egypt; and the frogs came up, and covered the land of Egypt."
The EGW passage directly references the event described in Exodus 8:6, where Aaron stretches out his hand and frogs cover the land of Egypt. It's a clear and explicit allusion.
"Then Pharaoh called for Moses and Aaron, and said, Intreat the Lord, that he may take away the frogs from me, and from my people; and I will let the people go, that they may do sacrifice unto the Lord."
The EGW passage directly quotes Pharaoh's request to Moses and Aaron to entreat the Lord to remove the frogs, which is found in Exodus 8:8. This is a clear and explicit allusion.