What is the song/lullaby at the end of Sons of Anarchy Season 6 Episode 9?

I just saw the very ending of one episode of Sons of Anarchy Season 6 Episode 9 and a woman was singing to a baby in the end. I thought it was a very beautiful song/lullaby but didn't catch enough lyrics to be able to find it. I'd really love to have it but I don't know what they song is. I tried looking it up but found nothing. Does anyone know what the song/lullaby is? Thank you.

Maggie Siff and the Forest Rangers - Lullaby For A Soldier (Arms of the Angels)
You can download it on iTunes.