It wasnarrated from Samurah that the Prophet (ﷺ) said:
"Every boyismortgaged by his 'Aqiqah, so slaughter for him on the seventh day,and shave his head, and name him." (FR)
English reference (FR): Vol. 4, Book 27, Hadith 3165 (FR)
Arabic reference (FR): Book 27, Hadith 3285 (FR)