The Return of the King, “The Passing of the Grey Company”. Said by Aragorn to Legolas and Gimli about the Paths of the Dead, quoting Malbeth the Seer. Elrond had sent Aragorn a message with his sons saying “Bid Aragorn remember the words of the seer, and the Paths of the Dead.”

Over the land there lies a long shadow,
westward reaching wings of darkness.
The Tower trembles; to the tombs of kings
doom approaches. The Dead awaken;
for the hour is come for the oathbreakers:
at the Stone of Erech they shall stand again
and hear there a horn in the hills ringing.
Whose shall the horn be? Who shall call them
from the grey twilight, the forgotten people?
The heir of him to whom the oath they swore.
From the North shall he come, need shall drive him:
he shall pass the Door to the Paths of the Dead.

Provided by: Ainulindale