'Abdur-Rahman bin Sa'd bin 'Ammar bin Sa'd, the Mu'adhdhinof theMessenger of Allah (ﷺ), narrated from his father, from hisfather,from his grandfather, that the Messenger of Allah (ﷺ) usedto saythe Takbir in the 'Eid prayer, seven times in the first(Rak'ah)before reciting Qur'an, and five times in the secondbefore recitingQur'an.
English reference: Vol. 1, Book 5, Hadith 1277
Arabic reference: Book 5, Hadith 1336