لَا إِلَهَ إِلَّا اللَّهُ الْوَاحِدُ الْقَهَّارُ، رَبُّ السَّمَوَاتِ وَالْأَرْضِ وَمَا بَيْنَهُمَا الْعَزِيزُ الْغَفَّارُ

Laa 'ilaaha 'illAllahul-Waahidul-Qahhaar, Rabbus-samaawaati wal'ardh, wa maa baynahumal-'Azeezul-Ghaffaar

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. Aaishah (RA) narrated that the Messenger of Allah (ﷺ) used to say at night if he turned during sleep: (the dua is mentioned above)

Reference: Sahih by Hakim. Imam Dhahabi 1/540; Nasai, Amalul Yaomi Wallayla No. 202, Ibnus sunni No. 757. Also see, Sahih Jame 4:213