Reference : Hisn al-Muslim 112

لا إِلـهَ إِلاّ اللهُ
الـواحِدُ القَهّـار
رَبُّ السَّـمواتِ وَالأرْضِ وَما بَيْـنَهـما
العَزيـزُ الغَـفّار
Lā ilāha illallāh
al-Wāḥidul-Qahhār, 
Rabbus-samāwāti wa ‘l-arḍi wa mā baynahuma 
al-`Azīzul-Ghaffār.


There is none worthy of worship but Allah, 
the One, the Victorious, 
Lord of the heavens and the earth and all that is between them, 
the All-Mighty, the All-Forgiving.

Reference:
This is to be said if you turn over in bed during the night. Al-Hakim 
graded it authentic and Ath-Thahabi agreed 1/540. Also see An-Nasa'i, 
'Amalul-Yawm wal-Laylah, and Ibn As-Sunni. See also Al-Albani, 
Sahihul-Jami' As-Saghir 4/ 213.

Chapter: When tossing and turning during the night