As Beren looked into her eyes
Within the shadows of her hair,
The trembling starlight of the skies
He saw there mirrored shimmering.
Tinúviel the elven-fair,
Immortal maiden elven-wise,
About him cast her shadowy hair
And arms like silver glimmering.
Long was the way that fate them bore,
O'er stony mountains cold and grey,
Through halls of iron and darkling door,
And woods of nightshade morrowless.
The Sundering Seas between them lay,
And yet at last they met once more,
And long ago they passed away
In the forest singing sorrowless.
Upon Beren’s death, Lúthien’s grief led her to die as well, and at the Halls of Mandos, her singing was so beautiful she moved Mandos to pity, who allowed them to both live a second, mortal life on Tol Galen, in the east of Beleriand. 
 They had a child, Dior (the heir of Thingol), considered among the fairest of all living things, and with the blood of Maiar, Elf, and Man. 
 Beren involved himself in worldly affairs only once more, when dwarves killed his father-in-law and tried to spirit away the Nauglamír, a great necklace imbued with the Silmaril Beren recovered from Morgoth. The dwarves were killed, and he took the necklace. This eventually passed to his son Dior in Doriath, who was attacked by the Sons of Fëanor to claim the Silmaril. Dior’s daughter Elwing fled with the necklace to the Havens of Sirion, and when the Havens were overrun by the sons of Fëanor with the same intent as before, she leaped into the sea with it. However, Ulmo (God of the Sea) saved her and the Silymaril. 
 Ultimately, her husband Eärendil would have the Silmaril placed on his brow, and sail across the sky daily, making the Silmaril the Morning and Evening Star of Middle Earth. They had two children: Elrond, and Elros (first King of Númenor). Elrond’s daughter Arwen and Elros' very distant descendent Aragorn eventually marry, in a similar repetition of Beren and Lúthien’s fate.