Ibn Umar reported: The Messenger of Allah, peace and blessings be upon him, prohibited partial shaving. It was said to Nafi’, “What is partial shaving?” Nafi’ said, “It is to shave part of a boy’s head and leave the rest.”
In another narration, the Prophet said, “Shave it all or leave it all.”
Source: Ṣaḥīḥ al-Bukhārī 5576, Ṣaḥīḥ Muslim 2120
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
Al-Nawawi said, “The scholars agreed upon the disapproval of partial shaving if it is done in different places, unless it is done for medical treatment and so on.”
Source: Sharḥ al-Nawawī ‘alá Ṣaḥīḥ Muslim 2120
عَنْ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ نَهَى عَنْ الْقَزَعِ قَالَ قُلْتُ لِنَافِعٍ وَمَا الْقَزَعُ قَالَ يُحْلَقُ بَعْضُ رَأْسِ الصَّبِيِّ وَيُتْرَكُ بَعْضٌ
وفي رواية أخرى قال احْلِقُوهُ كُلَّهُ أَوْ اتْرُكُوهُ كُلَّهُ
5576 صحيح البخاري كتاب اللباس باب القزع
2120 صحيح مسلم كتاب اللباس والزينة باب كراهة القزع
قال النووي وَأَجْمَعَ الْعُلَمَاءُ عَلَى كَرَاهَةِ الْقَزَعِ إِذَا كَانَ فِي مَوَاضِعَ مُتَفَرِّقَةٍ إِلَّا أَنْ يَكُونَ لِمُدَاوَاةٍ وَنَحْوِهَا
2120 صحيح مسلم بشرح النووي