It was narrated that Ka'b bin 'Ujrah said: "The Messenger of Allah (peace be upon him) said: 'There are statements of remembrance following the prayer of which the one who says them will never be deprived of the reward: Glorifying Allah (SWT) thirty-three times following each prayer, and praising Him thirty-three times, and magnifying Him thirty-four times.'"
(Sunan an-Nasa'I, Book 13, Hadith 171)
(Sunan an-Nasa'I, Book 13, Hadith 171)