Du'a before sleep

Anytime: Refer to BEST TIMINGS

اللَّهُمَّ بِاسْمِكَ أَمُوتُ وَأَحْيَا

Allahumma bismika amutu wa ahya

O Allah, in Your name I die and I live.

Ṣaḥīḥ al-Bukhārī 6312