Ibn al-Aswad, from al-Aswad and 'Alqamah, from 'Abdullah, who said: The Messenger of Allah, peace and blessings be upon him, used to say the takbir at every lowering and raising, and at every standing and sitting, and so did Abu Bakr, 'Umar, and 'Uthman, may Allah be pleased with them. (1)

1150 - Muhammad ibn Rafi' informed us, saying: Hujayn—who is Ibn al-Muthanna—narrated to us, saying: Layth narrated to us, from 'Uqayl, from Ibn Shihab, who said: Abu Bakr ibn 'Abd al-Rahman ibn al-Harith ibn Hisham informed me that he heard Abu Hurayrah say: When the Messenger of Allah, peace and blessings be upon him, stood for prayer, he would say the takbir when he stood, then say the takbir when he bowed, then say "Sami'a Allahu liman hamidah" (Allah hears the one who praises Him) when he raised his back from the bowing position, then say while standing: "Rabbana laka al-hamd" (Our Lord, to You be praise), then say the takbir when he went down to prostrate, then say the takbir when he raised his head, then say the takbir when he prostrated, then say the takbir when he raised his head, and he would do that throughout the entire prayer until he finished it, and he would say the takbir when he stood up from the two rak'ahs after sitting. (2)

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(1) Its chain of transmission is authentic. Qutaybah: he is Ibn Sa'id, and Abu al-Ahwas: he is Sallam ibn Sulaym, and his hearing from Abu Ishaq—who is al-Sabi'i—was before his confusion, and 'Alqamah: he is Ibn Qays al-Nakha'i, and al-Aswad: he is Ibn Yazid al-Nakha'i.
Al-Tirmidhi (253) also narrated it from Qutaybah, with this chain of transmission, and said: A good and authentic hadith.
It has preceded via the path of Zuhayr ibn Mu'awiyah, from Abu Ishaq, with it, as number (1083), and as number (1142) with the addition of mentioning the taslim, and it will come via the path of Zuhayr as well as number (1319) with the addition of mentioning the taslim, and see the hadiths (1322) … (1325).

(2) Its chain of transmission is authentic. Layth: he is Ibn Sa'd, and 'Uqayl: he is Ibn Khalid al-Ayli, and it is in "al-Sunan al-Kubra" as number (740).
Muslim (392): (29) also narrated it from Muhammad ibn Rafi', with this chain of transmission.
Ahmad (9851) and al-Bukhari (789) also narrated it via two paths from al-Layth ibn Sa'd, with it.