There are certain ejaculations, the repeaters of which or the performers of which after every prescribed prayer will never be caused disappointment:" Glory be to Allah" thirty-three times." Praise be to Allah" thirty-three times, and" Allah is most Great" thirty-four times. (Using translation from Muslim 596a)
أَنَّ النَّبِيَّ ﷺ قَالَ مُعَقِّبَاتٌ لَا يَخِيبُ قَائِلُهُنَّ أَوْ فَاعِلُهُنَّ ثَلَاثًا وَثَلَاثِينَ تَسْبِيحَةً وَثَلَاثًا وَثَلَاثِينَ تَحْمِيدَةً وَأَرْبَعًا وَثَلَاثِينَ تَكْبِيرَةً فِي دُبُرِ كُلِّ صَلَاةٍ