Reference : Hisn al-Muslim 69

سُـبْحانَ اللهِ 
والحَمْـدُ لله 
واللهُ أكْـبَر
(ثلاثاً وثلاثين) 
لا إلهَ إلاّ اللّهُ
وَحْـدَهُ لا شريكَ لهُ
لهُ الملكُ ولهُ الحَمْد
وهُوَ على كُلّ شَيءٍ قَـدير
Subḥānallāh,
walḥamdu lillāh, 
wallāhu 'akbar,
(each said thirty-three times)
Lā 'ilāha 'illallāh
waḥdahu lā sharīka lahu, 
lahul-mulku wa lahul-ḥamd
wa huwā`lā kulli shay'in qadīr.


Glory is to Allah,
and praise is to Allah, 
and Allah is the Most Great. 
(each said thirty-three times)
None has the right to be worshiped but Allah alone, 
He has no partner, 
His is the dominion and His is the praise
and He is Able to do all things.

Reference:
Muslim 1/418, Whoever says this after every prayer will be forgiven his 
sins even though they be as the foam of the sea.

Chapter: After salam