"when the (first) ten (days of Dhul-Jijjah) begin, and one of you wants to offer a sacrifice, let him not remove anything from his hair or skin."
The Book of ad-Dahaya (Sacrifices)
Sunan an-Nasa'i - Hadith 4364
Hadith Text
"When the (first) ten (days of Dhul-Hijjah) begin, and one of you wants to offer a sacrifice, let him not remove anything from his hair or skin."
Commentary
This prohibition applies specifically to those who intend to perform the udhiyah (sacrificial offering). The wisdom behind this ruling is to maintain the completeness of one's body for the sacrifice, drawing a spiritual parallel between the sacrificer and the animal being offered.
Scholars explain that just as the sacrificial animal should be free from defects, the one offering it should also refrain from removing any part of himself during this sacred period. This includes hair, nails, and skin, symbolizing complete devotion and submission to Allah.
The prohibition begins with the commencement of Dhul-Hijjah and continues until after the sacrifice has been performed. This ruling emphasizes the sanctity of these ten days and the importance of maintaining physical integrity while preparing for this act of worship.
Juridical Ruling
The majority of scholars consider this prohibition to be strongly recommended (mustahabb) rather than obligatory. However, it is best to adhere to this guidance out of respect for the sanctity of the ritual and to follow the Prophet's example completely.