Sahih Bukhari Volume 007, Book 066, Hadith Number 383.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 66. Sacrifice on Occasion of Birth (Aqiqah)
Narrated By Abu Huraira : The Prophet said, "Neither Fara' nor 'Atira) is permissible)." Al-Fara' was the first offspring (they got of camels or sheep) which they (pagans) used to offer (as a sacrifice) to their idols. 'Atira was (a sheep which used to be slaughtered) during the month of Rajab.