Narrated 'Amr bin Shu'aib:
from his father, from his grandfather that the Prophet (ﷺ) ordered naming the child on the seventh day, removing the harm from him, and Al-'Aqq (removing the hair and slaughtering the animal for 'Aqiqah). (PT)
English reference (PT): Vol. 5, Book 41, Hadith 2832 (PT)
Arabic reference (PT): Book 43, Hadith 3066 (PT)