Lúthien danced

Then clearly thrilled her voice and rang;
with sudden ecstasy she sang
a song of nightingales she learned
and with her elvish magic turned
to such bewildering delight
the moon hung moveless in the night.
And this it was that Beren heard,
and this he saw, without a word,
enchanted dumb, yet filled with fire
of such a wonder and desire
that all his mortal mind was dim;
her magic bound and fettered him,
and faint he leaned against a tree.
Forwandered, wayworn, gaunt was he,
his body sick and heart gone cold,
grey in his hair, his youth turned old;
for those that tread that lonely way
a price of woe and anguish pay.
And now his heart was healed and slain
with a new life and with new pain.
He gazed, and as he gazed her hair
within its cloudy web did snare
the silver moonbeams sifting white
between the leaves, and glinting bright
the tremulous starlight of the skies
was caught and mirrored in her eyes.

The Geste of Beren and Lúthien
by J.R.R. Tolkien (lines 537-562)