Sahih Muslim 871
The Book of Prayers
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)
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.