Taken from "The Life of Muhammad" by Muhammad Husayn Haykal,
translated by Dr. Ismail Ragi A. al Faruqi
Allah T'ala says in the Holy Quran:
Can dress be so important that its violations may put a man or a woman into hellfire? Let us read.
Allah T'ala says in the Holy Quran:
يَا بَنِي آدَمَ قَدْ أَنزَلْنَا عَلَيْكُمْ لِبَاسًا يُوَارِي سَوْءَاتِكُمْ وَرِيشًا وَلِبَاسُ التَّقْوَىَ ذَلِكَ خَيْرٌ ذَلِكَ مِنْ آيَاتِ اللّهِ لَعَلَّهُمْ يَذَّكَّرُونَ
The first part of verse 16:90 says:
"Allah enjoins justice, generosity and kind treatment with kindred."
The verse 16:90 is being recited in Jumuah khutbas every Friday in millions of Masajid throughout the world since the time of Umar bin Abdul Aziz (may Allah T'ala be please with him).
The first of these three commandments of Allah T'ala is justice which has two aspects.
To make such arrangements as may enable everyone to get one's due rights without stint. Justice does not, however, mean equal distribution of rights, for that would be absolutely unnatural. In fact, justice means equitable dispensation of rights which in certain cases may mean equality. For example, aII citizens should have equal rights of citizenship but in other cases equality in rights would be injustice. For instance, equality in social status and rights between parents and their children will obviously be wrong. Likewise those who render services of superior and inferior types cannot be equal in regard to wages and salaries. What AIIah enjoins is that the full rights of everyone should be honestly rendered whether those be moral, social, economic legal or political in accordance with what one justly deserves.
1638. Ibn `Umar (May Allah be pleased with them) said: The Messenger of Allah (PBUH) forbade shaving a part of the head.
[Al-Bukhari and Muslim].
1639. Ibn `Umar (May Allah be pleased with them) said: The Messenger of Allah (PBUH) saw a boy, some portion of whose head was shaved and some of it was left out. He prohibited them from that and said, "Shave the whole of it or leave the whole of it.''
Commentary: This order of Prophet (PBUH) was based on the reason that that hair-style was then in vogue among the Jews and Christian priests and ascetics. This style was also popular with the group which was given to mischief and disobedience. This is, however, permissible in exceptional circumstances. In any case, either one should shave the hair completely or keep them in such a style that there is no resemblance with women.
1640. `Abdullah bin Ja`far (May Allah be pleased with them) said: The Prophet (PBUH) gave respite for three days to the family of Ja`far (after his martydom). Then he came and said, "Don't weep for my brother after this day.'' He said, "Bring all of my nephews to me.'' We were accordingly brought as if we were chickens. Then he said, "Call for me a barber.'' He directed him to shave our heads which he did.
Commentary: Ja`far was the cousin of the Prophet (PBUH) and he was martyred in the battle of Mu'tah. Although martyrdom is an honour but even then the bereaved family does feel the shock of the loss. For this reason, the Prophet (PBUH) permitted them to give vent to their grief for three days. It should not, however, be taken to mean that he allowed them to lament and wail, because that is prohibited. What he actually allowed them was the natural weeping which does occur when people come for condolence and speak of the deceased. Such expression of grief is permissible after a period of three days also.
Therefore, what the Prophet (PBUH) had advised them was not in the nature of unlawful but natural. The children of the deceased called themselves "chickens'' as they were greatly enervated by the tragedy. This Hadith has been mentioned here to confirm the validity of shaving the hair of the head, especially of children, although keeping bobbed hair is more meritorious because the Prophet (PBUH) himself did so. Bobbed hair are cut short and allowed to hang loosely.
1641. `Ali (May Allah be pleased with him) said: The Messenger of Allah (PBUH) prohibited a woman from shaving her head.
Commentary: This Hadith is also included in At-Tirmidhi but Sheikh Al-Albani has regarded it "Da`if'' (weak). Please see Ahadith Ad-Da`ifah. However, in order to avoid resemblance with men, this prohibition for women will stand. If it is required on medical ground then it will be permissible.