"“How beautiful upon the mountains are the feet of him that bringeth good tidings, that publisheth peace; that bringeth good tidings of good, that publisheth salvation; that saith unto Zion, Thy God reigneth! ... Break forth into joy, sing together, ye waste places: ... for the Lord hath comforted His people.... The Lord hath made bare His holy arm in the eyes of all the nations; and all the ends of the earth shall see the salvation of our God.” Isaiah 52:7-10 . DA 828.1"
"How beautiful upon the mountains are the feet of him that bringeth good tidings, that publisheth peace; that bringeth good tidings of good, that publisheth salvation; that saith unto Zion, Thy God reigneth!"
The EGW passage directly quotes Isaiah 52:7-10.
"How beautiful upon the mountains are the feet of him that bringeth good tidings, that publisheth peace; that bringeth good tidings of good, that publisheth salvation; that saith unto Zion, Thy God reigneth! Thy watchmen shall lift up the voice; with the voice together shall they sing: for they shall see eye to eye, when the Lord shall bring again Zion. Break forth into joy, sing together, ye waste places of Jerusalem: for the Lord hath comforted his people, he hath redeemed Jerusalem. The Lord hath made bare his holy arm in the eyes of all the nations; and all the ends of the earth shall see the salvation of our God."
Ellen White directly references Isaiah 52:7-10 in this passage.