It is narrated from Sayyida Umm Karz (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said regarding ‘Aqiqah: “For a boy, two goats are to be sacrificed, and for a girl, one goat is sufficient.”
Hadith Referenceسنن دارمي / من كتاب الاضاحي / 2005