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 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."