"was delivered to Moses a copy of the Decalogue engraved by the finger of God Himself upon two tables of stone ( Deuteronomy 9:10 ; Exodus 32:15, 16 ), to be sacredly enshrined in the sanctuary, which, when made, was to be the visible center of the nation's worship. PP 314.1"
"And the Lord delivered unto me two tables of stone written with the finger of God; and on them was written according to all the words, which the Lord spake with you in the mount out of the midst of the fire in the day of the assembly."
Ellen White directly references Deuteronomy 9:10 in this passage.
"From a race of slaves the Israelites had been exalted above all peoples to be the peculiar treasure of the King of kings. God had separated them from the world, that He might commit to them a sacred trust. He had made them the depositaries of His law, and He purposed, through them, to preserve among men the knowledge of Himself. Thus the light of heaven was to shine out to a world enshrouded in darkness, and a voice was to be heard appealing to all peoples to turn from their idolatry to serve the living God. If the Israelites would be true to their trust, they would become a power in the world. God would be their defense, and He would exalt them above all other nations. His light and truth would be revealed through them, and they would stand forth under His wise and holy rule as an example of the superiority of His worship over every form of idolatry. PP 314.2"
"Now therefore, if ye will obey my voice indeed, and keep my covenant, then ye shall be a peculiar treasure unto me above all people: for all the earth is mine: And ye shall be unto me a kingdom of priests, and an holy nation. These are the words which thou shalt speak unto the children of Israel."
The EGW passage echoes the themes of Exodus 19:5-6, particularly the idea of Israel being a 'peculiar treasure' and a nation set apart to reveal God's truth to the world. It expands on the purpose and potential of this chosen status.