The Prophet (ﷺ) said: The person who wakes up at night says these words -

لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيْكَ لَهُ، لَهُ الْمُلْكُ وَلَهُ الْحَمْدُ وَهُوَ عَلَى كُلِّ شَىْءٍ قَدِيْرٌ‏.‏ اَلْحَمْدُ لِلَّهِ، وَسُبْحَانَ اللَّهِ، وَلَا إِلَهَ إِلَّا اللَّهُ، وَاللَّهُ أَكْبَرُ، وَلَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ

Laa ilaaha illAllahu Wa'hdahu laa Sharika lahu Lahul mulku, wa lahul-'hamdu wa huwa 'alaa kulli shay'in Qadir. Alhamdulillah wa subhanallah wa laa ilaaha illAllahu wAllahu akbar wa laa 'hawla Walaa Quwata illa billah

None has the right to be worshipped but Allah. He is the Only One and has no partners. For Him is the Kingdom and all the praises are due for Him. He is Omnipotent. All the praises are for Allah. All the glories are for Allah. And none has the right to be worshipped but Allah, And Allah is Great And there is neither Might nor Power Except with Allah. Then says: O Allah! Forgive me. Or invokes (Allah), he will be responded to and if he performs ablution (and prays), his prayer will be accepted.

Reference: Bukhari: 1154