the Prophet (ﷺ) forbade qaza' which means that the head of a boy is shaved and a lock is left.
Sunan Abi Dawud Book 35, Hadith 36
← Previous Hadith The Messenger of Allah (ﷺ) forbade qaza'. Qaza' means having part of a boy's head shaved and leaving part unshaven.

Sunan Abi Dawud Book 35, Hadith 35 Next Hadith → The Prophet (ﷺ) saw a boy with part of his head shaved and part left unshaven. He forbade them to do that, saying: Shave it all or leave it all.

Sunan Abi Dawud Book 35, Hadith 37