Laer Cú Beleg
From Tolkien Gateway
Laer Cú Beleg (Sindarin for Song of the Great Bow) was sung and composed by Túrin Turambar as a lament for the death of his friend Beleg Cúthalion. The song, which echoed out over the Pools of Ivrin, was a release for Túrin after he had murdered Beleg through a terrible misfortune.