From Sahih Bukhari (Hadith 6312):
Narrated Hudhaifa:When the Prophet (ﷺ) went to bed, he would say: "Bismika amutu wa ahya." and when he got up he would say:" Al-hamdu li l-lahil-ladhi ahyana ba'da ma amatana wa ilaihin-nushur
Reference: Bukhari 6312