Narrated Sa`id bin Al-Harith: Abu Sa`id 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 rak`a. Abu Sa`id said, "I saw the Prophet doing the same."
The chain is ordered from the source of the saying to the compiler: 1 = the speaker/first transmitter, the following links those who passed it on in turn, and at the bottom al-Bukhari who compiled the work. Click a narrator to list every hadith in which he appears; the number in parentheses is how many hadiths across the collections on this site the narrator appears in.