It is narrated from Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The mu'aqqibat, whose sayer or doer is never disappointed: 33 glorifications (tasbih), 33 praises (tahmid), and 34 declarations of Allah's greatness (takbir) after every prayer."
Hadith Referenceالمعجم الكبير للطبراني / باب الكاف / 16312