Hisn al-Muslim
What to say after completing the prayer — Du'a 4
سُبحَانَ اللَّهِ، وَالحَمدُ لِلَّهِ، وَاللَّهُ أَكبَرُ (ثلاثاً وثلاثين) لاَ إِلَهَ إِلاَّ اللَّهُ وَحدَهُ لاَ شَرِيكَ لَهُ، لَهُ المُلكُ وَلَهُ الحَمدُ وَهُوَ عَلَى كُلِّ شَيءٍ قَدِيرٌ
Pronunciation
Subhanal lah walhamdu lillah, wallahu akbar (thirty three times). (La ilaha illal lahu wahdahu la shareeka lah, lahul mulku walahul hamd, wahuwa 'ala kulli shayin qadeer
English meaning
How perfect Allah is, all praise is for Allah, and Allah is the greatest.(thirty-three times) (None has the right to be worshipped except Allah, alone, without partner, to Him belongs all sovereignty and praise and He is over all things omnipotent.)
Repeat 33 times.