Isaiah 55:12

"For you will go out with joy, And be led forth with peace; The mountains and the hills will break forth into shouts of joy before you, And all the trees of the field will clap their hands".

“(Isaiah 53-55) - this is about the gospel and the New Covenant coming into the earth. Isaiah 55:12; "You will go out in joy and be led forth in peace and the mountains and the hills will burst into song before you and the trees of the fields will clap their hands". Now in prophetic language, mountains refer to nations. They can also refer to problems. Nations will burst into song for the people who go out in joy and be led forth in peace. Zion the joy of the whole earth is led out in joy and goes forth in peace, nations will burst into songs of praise or mountains of problems will have to give way to the song of joy and peace in the earth”.

Ref: Rob Rufus - "Session 4" - "Grace and Glory Conference - Dubai" - 1st February 2008.