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.
1؎ : From this hadith, it is understood that it is permissible to weep and express grief over the deceased for up to three days, as long as it is without wailing or striking the chest.
Explanation & Benefits
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