The Book of al-'Aqiqah
40/4. Chapter:
How Many Sheep Should Be Slaughtered As An 'Aqiqah For A Girl?
Sunan an-Nasai
أَخْبَرَنَا أَحْمَدُ بْنُ حَفْصِ بْنِ عَبْدِ اللَّهِ، قَالَ حَدَّثَنِي أَبِي قَالَ، حَدَّثَنِي إِبْرَاهِيمُ، - هُوَ ابْنُ طَهْمَانَ - عَنِ الْحَجَّاجِ بْنِ الْحَجَّاجِ، عَنْ قَتَادَةَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ عَقَّ رَسُولُ اللَّهِ صلى الله عليه وسلم عَنِ الْحَسَنِ وَالْحُسَيْنِ رضى الله عنهما بِكَبْشَيْنِ كَبْشَيْنِ .
It was narrated that Ibn 'Abbas said: "The Messenger of Allah offered an 'Aqiqah for Al-Hasan and Al-Husain, may Allah be please with them, two rams for each."
Reference : Sunan an-Nasa'i 4219In-book reference : Book 40, Hadith 8English translation : Vol. 5, Book 40, Hadith 4224