Hadith: what to pray at sleep and at wake up

Sahih Al Bukhari – Book of Oneness, Uniqueness Of Allah (Tawheed)

Volumn 009, Book 093, Hadith Number 491. 
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Narated By Juhaifa RA : When the Prophet PBUH went to bed, he used to say, 

"Allhumma bi-issmika ahya wa amut." 

اللهم بسمك اموت واحيا

And when he got Up in the mornings he used to say, 

"Alhamdu lillahi al-ladhi ahyana ba'da ma amatana wa ilaihi-n-nushur.