This verse is a fragment of the Galadriel's Lament (The Fellowship of the Ring book). This Quenya text is by J.R.R. Tolkien. For its analysis see J.R.R. Tolkien The Road Goes Ever On. It is performed by Elizabeth Fraser.
Solo [by Elisabeth Fraser] in Quenya
Ar sindarnoriello caita mornie,
Ar ilye tier undulave lumbule...
Out of a grey country darkness lies
And all paths are drowned deep in shadow...