Compiled by Imam Yahya ibn Sharaf al-Nawawi
وعن كعب بن عجرة رضي الله عنه عن رسول الله صلى الله عليه وسلم قال: "معقبات لا يخيب قائلهن -أو فاعلهن- دبر كل صلاة مكتوبة: ثلاثًا وثلاثين تسبيحة وثلاثًا وثلاثين تحميدة، وأربعًا وثلاثين تكبيرة" ((رواه مسلم)).
The Messenger of Allah (ﷺ) said, "There are some words, the reciters of which will never be disappointed. These are: Tasbih [saying 'Subhan-Allah' (Allah is free from imperfection)], thirty-three times, Tahmid [saying 'Al-hamdu lillah' (praise be to Allah)] thirty-three times and Takbir [saying 'Allahu Akbar' (Allah is Greatest)] thirty-four times; and these should be recited after the conclusion of every prescribed prayer."[Muslim]