Narrated Abdullah ibn Jafar: The Prophet ﷺ gave the children of Jafar three day' time to visit them. He then came to visit them, and said: Do not weep over my brother after this day. He said: Call to me the children of my brother. We were brought to him as if we were chicken. He said: Call a barber to me. He then ordered and our heads were shaved.
Shaykh Umar Farooq Saeedi
Benefits and Issues: There is no harm in shaving the hair of children, and similarly, it is also permissible for men.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4192