Kathir bin ‘Abdullah bin ‘Amr bin ‘Awf narrated, from his father, from his grandfather, that the Messenger of Allah ﷺ said the Takbir in the ‘Eid prayers, seven times in the first Rak’ah and five times in the second.
أَنَّ رَسُولَ اللَّهِ ﷺ كَبَّرَ فِي الْعِيدَيْنِ سَبْعًا فِي الأُولَى وَخَمْسًا فِي الآخِرَةِ