Sacrifice (Kitab Al-Dahaya)
Dawud :: Book 15 : Hadith 2837
Narrated Buraydah ibn al-Hasib:
When a boy was born to one of us in the pre-Islamic period, we sacrificed a sheep and smeared his head with its blood; but when Allah brought Islam, we sacrificed a sheep, shaved his head and smeared his head with saffron.