All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
We do not know the wisdom of determining the number of Takbeer after the obligatory prayers by 33 times or by 34 times as in some sound Ahaadeeth. However, we are ordained to obey Allaah and His Prophet and we are ordered to follow his Sunnah in all cases whether or not we know the wisdom. Allaah Says (what means): {Indeed in the Messenger of Allaah you have a good example to follow for him who hopes for (the meeting with) Allaah and the Last Day, and remembers Allaah much.}[Quran 33:21] Allaah further Says (what means): {And if you obey him, you will be [rightly] guided.}[Quran 24:54] For more benefit, please refer to Fataawa 81736 and 92705.
Allaah Knows best.