"The leaders went to the door of the tabernacle and fell upon their faces. Again “the glory of the Lord appeared,” and Moses was directed, “Take the rod, and gather thou the assembly together, thou and Aaron thy brother, and speak ye unto the rock before their eyes; and it shall give forth his water, and thou shalt bring forth to them water out of the rock.” PP 417.1"
"Take the rod, and gather thou the assembly together, thou, and Aaron thy brother, and speak ye unto the rock before their eyes; and it shall give forth his water, and thou shalt bring forth to them water out of the rock: so thou shalt give the congregation and their beasts drink."
EGW directly quotes Numbers 20:8, making this a clear and explicit allusion.
"And Moses and Aaron went from the presence of the assembly unto the door of the tabernacle of the congregation, and they fell upon their faces: and the glory of the Lord appeared unto them."
EGW references the event described in Numbers 20:6, where Moses and Aaron fall on their faces before the Lord and the glory of the Lord appears. While not a direct quote of the entire verse, the key elements are present.
"The two brothers went on before the multitude, Moses with the rod of God in his hand. They were now aged men. Long had they borne with the rebellion and obstinacy of Israel; but now, at last, even the patience of Moses gave way. “Hear now, ye rebels,” he cried; “must we fetch you water out of this rock?” and instead of speaking to the rock, as God had commanded him, he smote it twice with the rod. PP 417.2"
"And Moses and Aaron gathered the congregation together before the rock, and he said unto them, Hear now, ye rebels; must we fetch you water out of this rock?"
EGW directly quotes Moses's words from Numbers 20:10, making this a clear allusion. The surrounding context is also very similar.