Safwan bin 'Isa al-Zhry صفوان بن عيسى الزهري أبو محمد البصري · Chapters on Slaughtering

“Every boy is mortgaged by his ‘Aqiqah, so slaughter for him on the seventh day, and shave his head, and name him.”

“The Messenger of Allah (ﷺ) commanded that the blade should be sharpened, and hidden from the animals, and he said: ‘When one of you slaughters, let him do it quickly.’” Another chain reports the same.