Reference : Hisn al-Muslim 2

لا إلهَ إلاّ اللّهُ وَحْـدَهُ لا شَـريكَ له،
لهُ المُلـكُ ولهُ الحَمـد، 
وهوَ على كلّ شيءٍ قدير، 
سُـبْحانَ اللهِ، والحمْـدُ لله، 
ولا إلهَ إلاّ اللهُ واللهُ أكبَر، 
وَلا حَولَ وَلا قوّة إلاّ باللّهِ العليّ العظيم، 
رَبِّ اغْفرْ لي
Lā 'ilāha 'illallāhu waḥdahu la sharīka lahu, 
lahul-mulku wa lahul-ḥamdu, 
wa huwa 'alā kulli shay'in qadīr
Subḥānallāhi, walḥamdu lillāhi, 
wa lā 'ilāha 'illallāhu, wallāhu 'akbar, 
wa lā ḥaula wa lā quwwata 'illā billāhil-`aliyyil-`aẓīm, 
rabbighfir lī.

There is none worthy of worship but Allah alone, Who has no partner, 
His is the dominion and to Him belongs all praise, 
and He is able to do all things.
Glory is to Allah. Praise is to Allah.
There is none worthy of worship but Allah. Allah is the Most Great. 
There is no might and no power except by Allah's leave, the Exalted, the Mighty.
My Lord, forgive me.

Reference:
Whoever says this will be forgiven, and if he supplicates Allah, his prayer 
will be answered; if he performs ablution and prays, his prayer will be 
accepted. Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 3/39, among others. The 
wording here is from Ibn Majah 2/335.

Chapter: When waking up