Mishkat al-Masabih

Sa'id b. al-Harith b. al-Mu‘alla said that Abu Sa'id al-Khudri led them in prayer and said the takbir loudly when he raised his head after the prostration, when he prostrated himself, and when he rose at the end of two rak'as, and he said, “Thus did I see the Prophet (ﷺ) do." Bukhari transmitted it.