Reference : Hisn al-Muslim 105

بِاسْـمِكَ اللّهُـمَّ أَمـوتُ وَأَحْـيا
Bismika Allāhumma amūtu wa aḥyā.

In Your Name, O Allah, I die and I live.

Reference:
Here, dying and living are metaphors for sleep and wakefulness. This 
explains why the normal order of these words has been reversed in this 
Hadith. In other contexts the living is mentioned before dying. See Qur'an 
Al-Baqarah 2:258, Aal-'Imrdn 3:156, Al-A'raf 7:158 among many other 
examples, (trans.). See also Al-Asqalani, Fathul-Bari 11/113, Muslim 4/ 
2083.

Chapter: Before sleeping