Abdullah bin Buraydah heard his father, Sayyiduna Buraydah (may Allah be pleased with him), say: In the Jahiliyyah, when a boy was born to one of us, he would slaughter a goat and smear the child's head with its blood. When Allah Almighty brought Islam, we would slaughter a goat, shave the child's head and smear it with saffron.
(b) Yazid bin Abdullah al-Muzani narrates from his father (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 there is the fara'; the aqiqah is performed for a boy, but his head is not touched with blood."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19288