Sahih Al Bukhari Hadith Number 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?”

10  Call to Prayers (Adhaan)
Hadith number 787
Volume no 1
Chapter: 116 (Itmam At-Takbir (i.e., to end the number of Takbir, or to say the Takbir perfectly) on prostrating. [See Fath Al-Bari]