Sahih Bukhari Volume 9, Book 93, Hadith Number 491.

Narrated By Juhaifa : When the Prophet went to bed, he used to say, “Allhumma bismika ahya wa amut.” 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.”