Science states that a healthy individual takes 20-25 breaths in a minute while sleeping. So for instance if a person takes on average 19 breaths in a min, he will take (19*60) breaths in an hour (1140). Now if he sleeps 8 hours in a day (8*1140) he will take 9120 breaths. Our beloved Prophet SAW says that whoever recites        [] before going to sleep, ALLAH سبحانہ تعالی orders the angels to note down a good deed on every breath he takes. (Reference book: Tuhfatul Muraad, page 82) Friends if we recite complete Bismillah before sleeping, be it in the daytime or at night, during travelling or whenever, then we can earn thousands of good deeds while sleeping! (Saad Abdullah, Chakwal)