(26) باب اسْتِحْبَابِ الذِّكْرِ بَعْدَ الصَّلاَةِ وَبَيَان صِفَتِهِ
Ka'b b. 'Ujra reported Allah's Messenger (ﷺ) as saying:
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.
Reference: Sahih Muslim 596 a
In-book reference: Book 5, Hadith 186
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1241