There is a lyrical/musical prayer near the end of the film when Amir is praying at the mosque after finding Sohrab gone that doesn't seem to be on the soundtrack. If anyone knows the origins of the text (see lyrics below) or where I might find this recording PLEASE let me know...
Oh my Lord, my sins are like the hardest mountains.
My good deeds are very few, they're like a small pebble.
I turn to you, my heart full of shame, my eyes full of tears.
Bestow your forgiveness and mercy upon me.