Muwatta Malik 165
Prayer
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ، أَنَّ أَبَا هُرَيْرَةَ، كَانَ يُصَلِّي لَهُمْ فَيُكَبِّرُ كُلَّمَا خَفَضَ وَرَفَعَ فَإِذَا انْصَرَفَ قَالَ وَاللَّهِ إِنِّي لأَشْبَهُكُمْ بِصَلاَةِ رَسُولِ اللَّهِ صلى الله عليه وسلم .
Yahya related to me from Malik from Ibn Shihab from Abu Salama ibn Abdar-Rahman ibn Awf that Abu Hurayra used to lead them in prayer and would say "Allah is greater" whenever he lowered himself and raised himself. When he had finished he would say, "By Allah, I am the person whose prayer most resembles the prayer of the Messenger of Allah, may Allah bless him and grant him peace
Grading: Salim al-Hilali: Sahih Lighairihi
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.