مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 4427
Clothing
Combing the Hair - Section 1
وَعَنِ ابْنِ عُمَرَ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَأَى صَبِيًّا قَدْ حُلِقَ بَعْضُ رَأْسِهِ وَتُرِكَ بَعْضُهُ فَنَهَاهُمْ عَنْ ذَلِكَ وَقَالَ: «احْلِقُوا كُلَّهُ أَوِ اتْرُكُوا كُلَّهُ» . رَوَاهُ مُسْلِمٌ
Ibn ‘Umar told that when the Prophet (ﷺ) saw a boy with part of his head shaved and part left unshaven he forbade them to do that, saying, ‘‘Shave it al or leave it all." Muslim transmitted it.
Mishkat al-Masabih, 4427صَحِيح (الألباني)