The Messenger of Allah ﷺ said, "There are phrases recited in succession after every obligatory prayer whose reciter will never be disappointed: thirty-three glorifications of Allah, thirty-three praises of Allah, and thirty-four declarations of Allah's greatness."
عن رسول الله ﷺ قال: معقبات لا يخيب قائلهن دبر كل صلاة مكتوبة، ثلاث وثلاثون تسبيحة، وثلاث وثلاثون تحميدة، وأربع وثلاثون تكبيرة.
Muslim narrated it in the chapter on mosques (596) from Hasan bin Isa, who reported from Ibn Mubarak, who reported from Malik bin Mughul, who said, I heard Hakam bin Utayba narrating from Abdul-Rahman bin Abu Layla, from Kaab bin Ujra, and he mentioned the same.His saying "muaqqibat" (recurring formulas), Harawi said that Samura said its meaning is glorifications of Allah recited at the end of prayers. Abu Haytham said they are called muaqqibat because they are performed one after another. As for the words of the Exalted, "He has angels who follow one after another, before him and behind him" [Rad 13:11], this means angels who succeed one another. This is what Nawawi said.