Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bukhari:825Yaḥyá b. Ṣāliḥ > Fulayḥ b. Sulaymān > Saʿīd b. al-Ḥārith

Abu Saʿid led us in the prayer and said the Takbir aloud on arising from the prostration, and on prostrating, on rising again, and on getting up from the second rakʿa. Abu Saʿid said, "I saw the Prophet doing the same."  

البخاري:٨٢٥حَدَّثَنَا 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 ﷺ