بُلُوغُ الْمَرَامِ
Bulugh al-Maram 495
The Book of Prayer
وَعَنْ عَمْرِوِ بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ: قَالَ نَبِيُّ اَللَّهِ - صلى الله عليه وسلم -{ اَلتَّكْبِيرُ فِي اَلْفِطْرِ سَبْعٌ فِي اَلْأُولَى وَخَمْسٌ فِي اَلْآخِرَةِ, وَالْقِرَاءَةُ بَعْدَهُمَا كِلْتَيْهِمَا } أَخْرَجَهُ أَبُو دَاوُدَ [1] .
Narrated 'Amr bin Shu'aib from his father on the authority of his grand father: The Prophet (ﷺ) of Allah (ﷺ) said: "The Takbir in ('Eid) al-Fitr prayer are seven in the first Rak'ah and five in the second, and the recitation of the Qur'an in both is after the Takbir." [Reported by Abu Dawud].
Sunnah.com reference: Book 2, Hadith 422