Heart of Jesus, desire of the everlasting hills, have mercy on us.

Bless the Lord, mountains and hills, sing praise to him and highly exalt him for ever.  (Daniel, Chapter 3)

The verse from Daniel is know as The Song of the Three Young Men, when the Angel of the Lord protects Daniel and his two friends from being burned to death in a furnace.  It is a prayer unique in the Bible, it should not only be read, but prayed with. Then one can understand, the reference to “desire of the everlasting hills”.