Yazid bin Abdullah al-Muzani (may Allah have mercy on him) narrates from his father, Sayyiduna Abdullah al-Muzani (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "For camels there is the fara' (sacrifice of the firstborn), and for sheep and goats there is also the fara'; and the aqiqah is offered on behalf of a boy, but his head is not to be touched with blood."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14072