Incantations... ?

[HerenIstarion]

Gandalf, you are straying off the topic. These are singed quotes

As for the answer, that was said by one of the spiders in the Mirkwood.

back to it

The King beneath the mountains,
The King of carven stone,
The lord of silver fountains
Shall come into his own!

His crown shall be upholden,
His harp shall be restrung,
His halls shall echo golden
To songs of yore re-sung.

The woods shall wave on mountains
And grass beneath the sun;
His wealth shall flow in fountains
And the rivers golden run.

The streams shall run in gladness,
The lakes shall shine and burn,
And sorrow fail and sadness
At the Mountain-king's return!