Song of the Great Bow
From Tolkien Gateway
Song of the Great Bow (Laer Cú Beleg in Sindarin) 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.