Galadhremmin Ennorath

[HerenIstarion]

FoTR, chapter 6 Old Forest:

O! Wanderers in the shadowed land
despair not! For though dark they stand,
all woods there be must end at last,
and see the open sun go past:
the setting sun, the rising sun,
the day’s end, or the day begun.
For east or west all woods must fail…

paralleled in FoTR chapter 8 Fog on the Barrow-Downs:

Get out, you old Wight! Vanish in the sunlight!
Shrivel like the cold mist, like the winds go wailing,
Out into the barren lands far beyond the mountains!
Come never here again! Leave your barrow empty!
Lost and forgotten be, darker than the darkness,
Where gates stand for ever shut, till the world is mended.

Must be referring to the future 'end of the world' and creation of Arda Remade