(Imām Bukhārī narrates): Yahyā ibn Sālih narrated to us, he said: Fulaih ibn Sulaimān narrated to us, from Sa'īd ibn al-Hārith, he narrated that:
Abū Sa'īd, may Allāh be pleased with him, led us in prayer. When he raised his head from sajdah, he pronounced the takbīr in a loud voice, and likewise when he performed sajdah, and when he raised his head, and when he stood up after two rak'ahs, and he said: I have seen the Prophet ﷺ doing this same thing.
حَدَّثَنَا يَحْيَى بْنُ صَالِحٍ، قَالَ حَدَّثَنَا فُلَيْحُ بْنُ سُلَيْمَانَ، عَنْ سَعِيدِ بْنِ الْحَارِثِ، قَالَ صَلَّى لَنَا أَبُو سَعِيدٍ فَجَهَرَ بِالتَّكْبِيرِ حِينَ رَفَعَ رَأْسَهُ مِنَ السُّجُودِ، وَحِينَ سَجَدَ، وَحِينَ رَفَعَ، وَحِينَ قَامَ مِنَ الرَّكْعَتَيْنِ وَقَالَ هَكَذَا رَأَيْتُ النَّبِيَّ صلى الله عليه وسلم.
Reference: Sahih Al Bukhari 825