Language:
كتاب الأذان
10  
Call to Prayers (Adhaan)
(116)
Chapter: Itmam At-Takbir (i.e., to end the number of Takbir, or to say the Takbir perfectly) on prostrating. [See Fath Al-Bari]
(116)
باب إِتْمَامِ التَّكْبِيرِ فِي السُّجُودِ
Sahih al-Bukhari 787

Narrated `Ikrima:

I saw a person praying at Muqam-Ibrahim (the place of Abraham by the Ka`ba) and he was saying Takbir on every bowing, rising, standing and sitting. I asked Ibn `Abbas (about this prayer). He admonished me saying: "Isn't that the prayer of the Prophet?"

حَدَّثَنَا عَمْرُو بْنُ عَوْنٍ، قَالَ حَدَّثَنَا هُشَيْمٌ، عَنْ أَبِي بِشْرٍ، عَنْ عِكْرِمَةَ، قَالَ رَأَيْتُ رَجُلاً عِنْدَ الْمَقَامِ يُكَبِّرُ فِي كُلِّ خَفْضٍ وَرَفْعٍ وَإِذَا قَامَ وَإِذَا وَضَعَ، فَأَخْبَرْتُ ابْنَ عَبَّاسٍ ـ رضى الله عنه ـ قَالَ أَوَلَيْسَ تِلْكَ صَلاَةَ النَّبِيِّ صلى الله عليه وسلم لاَ أُمَّ لَكَ‏.‏
Reference : Sahih al-Bukhari 787
In-book reference : Book 10, Hadith 182
USC-MSA web (English) reference : Vol. 1, Book 12, Hadith 754
  (deprecated numbering scheme)