Elven Hymn to Elbereth is the song from The Fellowship of the Ring (novel) that the Elves Frodo Baggins, Peregrin Took, and Sam Gamgee meet in the Shire are singing. The book says that the song is in the elven tongue, Sindarin, but the sound shapes itself in their heads into words.

Snow-white! Snow-white! O Lady clear!

O Queen beyond the Western Seas!

O Light to us that wander here

Amid the world of woven trees!

Gilthoniel! O Elbereth!

Clear are thy eyes and bright thy breath!

Snow-white! Snow-white! We sing to thee

In a far land beyond the Sea.

O stars that in the Sunless Year

With shining hand by her were sown,

In windy fields now bright and clear

We see your silver blossom blown!

O Elbereth! Gilthoniel!

We still remember, we who dwell

In this far land beneath the trees,

Thy starlight on Western Seas.