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 f

Suhail reported on the authority of his father that Abu Huraira used to recite takbir on all occasions of rising and bending (in prayer) and narrated that the Messenger of Allah (ﷺ) used to do like that.

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ - عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّهُ كَانَ يُكَبِّرُ كُلَّمَا خَفَضَ وَرَفَعَ وَيُحَدِّثُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَفْعَلُ ذَلِكَ ‏.‏
Reference : Sahih Muslim 392f
In-book reference : Book 4, Hadith 35
USC-MSA web (English) reference : Book 4, Hadith 769
  (deprecated numbering scheme)