Hadith 16:56
Hasan Sahih (Al-Albani)
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.
حَدَّثَنَا أَحْمَدُ بْنُ مُحَمَّدِ بْنِ ثَابِتٍ، حَدَّثَنَا عَلِيُّ بْنُ الْحُسَيْنِ، حَدَّثَنِي أَبِي، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ بُرَيْدَةَ، قَالَ سَمِعْتُ أَبِي بُرَيْدَةَ، يَقُولُ كُنَّا فِي الْجَاهِلِيَّةِ إِذَا وُلِدَ لأَحَدِنَا غُلاَمٌ ذَبَحَ شَاةً وَلَطَخَ رَأْسَهُ بِدَمِهَا فَلَمَّا جَاءَ اللَّهُ بِالإِسْلاَمِ كُنَّا نَذْبَحُ شَاةً وَنَحْلِقُ رَأْسَهُ وَنَلْطَخُهُ بِزَعْفَرَانٍ
Original Reference: Sunan Abi Dawud 2843