´Ka’b bin Ujrah narrated that:` The Prophet said: “There are Mu’aqqibat, he who says them shall not be miserable. Glorify Allah at the end of every prayer thirty-three times, and praise him thirty-three times, and extol His greatness thirty-four times.”
Related hadith on this topic
Explanation & Benefits
Hafiz Muhammad Ameen
1350. Commentary: "Is not unsuccessful." That is, however one recites, reward will certainly be attained, even if there is some negligence. Or, he will definitely enter Paradise.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 1350