It was narrated from 'Amr bin Shuaib, from his fahther, that his grandfather said: "The messenger of Allah was asked about the 'Aqiqah and he said: "Allah, the mighty and sublime, does not like Al-Uquq' as if he disliked the word (Al-Aqiqah). He said to the Messenger of Allah: 'But one of us may offer a sacrifice when a child is born to him.' He said: 'Whoever wants to offer a sacrifice for his child, let him do so, for a boy; two sheep, Mukafaatan, (of equal age), and for a girl, one.' (One of the narrators) Dawud said: 'I asked Ziad bin Aslam about the word Mukafaatan and he said: 'Two similar sheep that are slaughtered together.
Hadiths 4213https://sunnah.com/nasai:4213
أَخْبَرَنَا الْحُسَيْنُ بْنُ حُرَيْثٍ، قَالَ حَدَّثَنَا الْفَضْلُ، عَنِ الْحُسَيْنِ بْنِ وَاقِدٍ، عَنْ عَبْدِ اللَّهِ بْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم عَقَّ عَنِ الْحَسَنِ وَالْحُسَيْنِ .
It was narrated from 'Abdullah bin Buraidah, from his father, that: the Messenger of Allah offered the 'Aqiqah for Al-Hasan and Al-Husain.
It was narrated from Salman bin 'Amir Ad-Dabbi that the Messenger of Allah said: "For a boy there shoud be an 'Aqiqah, so shed blood for him, and remove the harm from him."
It was narrated that umm Kurz said: "I came to the Prophet and asked him about the sacrificial meat. I heard him say: 'For a boy, two sheep, and for a girl, one sheep, and it does not matter if they are male or female."'
It was narrated from Umma Kurz that the Messenger of Allah said: "For a boy, two sheep, and or a girl, one sheep, and it does not matter if they are male or female
Hadiths 4219https://sunnah.com/nasai:4219
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."
It was narrated from Qatadah, from Al-Hasan, from Samurh bin Jundab that the Messenger of Allah said: "Every boy is in pledge for his 'Aqiqah, so slaughter (the animal) for him on the seventh day, and shave his head, and a name"
It was narrated from Habib bin Ash-Shahid: "Muhammad bin Sirin said to me: 'Ask Al-Hasan (Al-Basri) from whom he heard this Hadith about the 'Aqiqah.' I asked him about that and he said: 'I heard it from Samurh."'