كتاب الصلاة
4  
The Book of Prayers
(10)
Chapter: Affirming The Takbir For Every Movement Up Or Down In The Prayer, Except When Rising From Ruku' When One Should Say: Sami'aAllahu Liman Hamidah (Allah Hears Those Who Praise Him)
(10)
باب إِثْبَاتِ التَّكْبِيرِ فِي كُلِّ خَفْضٍ وَرَفْعٍ فِي الصَّلاَةِ إِلاَّ رَفْعَهُ مِنَ الرُّكُوعِ فَيَقُولُ فِيهِ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ
Sahih Muslim 392 a

Abu Salama reported:

Abu Huraira led prayer for them and recited takbir when he bent and raised himself (in ruku' and sujud) and after completing (the prayer) he said: By Allah I say prayer which has the best resemblance with the prayer of the Prophet (ﷺ) amongst you.
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ، أَنَّ أَبَا هُرَيْرَةَ، كَانَ يُصَلِّي لَهُمْ فَيُكَبِّرُ كُلَّمَا خَفَضَ وَرَفَعَ فَلَمَّا انْصَرَفَ قَالَ وَاللَّهِ إِنِّي لأَشْبَهُكُمْ صَلاَةً بِرَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏
Reference : Sahih Muslim 392a
In-book reference : Book 4, Hadith 30
USC-MSA web (English) reference : Book 4, Hadith 764
  (deprecated numbering scheme)