Mishkat al-Masabih · Book 20 · Hadith 4158
عَن بُريدةَ قَالَ: كُنَّا فِي الْجَاهِلَيَّةِ إِذَا وُلِدَ لِأَحَدِنَا غلامٌ ذَبَحَ شاةٌ ولطَّخَ رأسَه بدمه فَلَمَّا جَاءَ الْإِسْلَامُ كُنَّا نَذْبَحُ الشَّاةَ يَوْمَ السَّابِعِ وَنَحْلِقُ رَأْسَهُ وَنُلَطِّخُهُ بِزَعْفَرَانٍ. رَوَاهُ أَبُو دَاوُد وَزَاد رزين: ونُسمِّيه
Buraida said: When a boy was born to one of us in the pre-Islamic period he sacrificed a sheep and smeared his head with its blood; but when Islam came we sacrificed a sheep on the seventh day, shaved his head and smeare…