What is the song from Naruto Shippuden episode 48 - Bonds at 3:10? This song is common in many episodes and even appears several times in one episode. It's kind of a sad music with male vocals and instrumentals such as some kind of flute or something similar. It's from episode 48 titled "Bonds" of Naruto Shippuden and starts close to 3:10.
it's this song here 

Naruto Shippuden OST 1 - Track 28 - Shippuu Kumikyoku ( Hurricane Suite )

the singing starts at 0:40