Listen to Down to the River to Pray (From "O Brother, Where Art Thou?") online. Down to the River to Pray (From "O Brother, Where Art Thou?") is an English language song and is sung by Origin Unknown. Down to the River to Pray (From "O Brother, Where Art Thou?"), from the album Big Movie Music, was released in the year 2015. The duration of the song is 2:56. Download English songs online from JioSaavn.