Dua – When Waking up during the night
The Prophet (Sallallahu alaiyhi wasallam) said: ‘Whoever awakes at night and then says:
[du‘a (a)]
‘None has the right to be worshipped except Allaah, alone without associate, to Him belongs sovereignty and praise and He is over all things wholly capable. How perfect Allaah is, and all praise is for Allaah, and none has the right to be worshipped except Allaah, Allaah is the greatest and there is no power nor might except with Allaah. The Most High, The Supreme.
…and then supplicates:
[du‘a (b)]
‘O my Lord forgive me.‘
…will be forgiven‘
Al-Waleed said, ‘or he (Sallallahu laiyhi wasallam) said: ‘ and then asks, he will be answered. If he then performs ablution and prays, his prayer will be accepted‘.’
Courtesy: www.everymuslim.co.za