Hadithcore
Hadith #2104010

In another narration it is mentioned:

"at-Takbir (Allah is the Most Great) is thirty-four times."

[وَفِي رِوَايَةٍ أُخْرَى : أَنَّ اَلتَّكْبِيرَ أَرْبَعٌ وَثَلَاثُونَ].‏ [1]‏

References2 variants
Sunnah.com reference
Book 2, Hadith 218
Arabic/English book reference
Book 2, Hadith 0