الْحَمْدُ لِلَّهِ الَّذِي أَحْيَانَا بَعْدَ مَا أَمَاتَنَا وَإِلَيْهِ النُّشُورُ

"All praise be to Allah, who gave us life after killing us (sleep is a form of death) and to Him will we be raised and returned".

(Bukhari, Muslim)

The Prophet said: Whoever awakes at night and then says:
None has the right to be worshipped except Allah, alone without associate, to Him belongs sovereignty and praise and He is over all things wholly capable. How perfect Allah is, and all praise is for Allah, and none has the right to be worshpped except Allah, Allah is the greatest and there is no power not might except with Allah, The Most High, The Supreme.

...and then supplicates:

All praise is for Allah who restored to me my health and returned my soul and has allowed me to remember Him.

Then recite from Qur'an - verse 3:190 till end of the chapter 'Al-Imran.