The Book of Prayers
4/10. 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)
Sahih Muslim
حَدَّثَنَا مُحَمَّدُ بْنُ مِهْرَانَ الرَّازِيُّ، حَدَّثَنَا الْوَلِيدُ بْنُ مُسْلِمٍ، حَدَّثَنَا الأَوْزَاعِيُّ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، أَنَّ أَبَا هُرَيْرَةَ، كَانَ يُكَبِّرُ فِي الصَّلاَةِ كُلَّمَا رَفَعَ وَوَضَعَ . فَقُلْنَا يَا أَبَا هُرَيْرَةَ مَا هَذَا التَّكْبِيرُ قَالَ إِنَّهَا لَصَلاَةُ رَسُولِ اللَّهِ صلى الله عليه وسلم .
Abu Salama reported that Abu Huraira recited takbir in prayer on all occasions of rising and kneeling. We said: O Abu Huraira, what is this takbir? He said: Verily it is the prayer of the Messenger of Allah (ﷺ).
Reference : Sahih Muslim 392eIn-book reference : Book 4, Hadith 34USC-MSA web (English) reference : Book 4, Hadith 768