حَدَّثَنَا عُثْمَانُ بْنُ عُثْمَانَ يَعْنِي الْغَطَفَانِيَّ أَخْبَرَنَا عُمَرُ بْنُ نَافِعٍ عَنْ أَبِيهِ عَنْ ابْنِ عُمَرَ قَالَ نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ الْقَزَعِ وَالْقَزَعُ أَنْ يُحْلَقَ الصَّبِيُّ فَيُتْرَكَ بَعْضُ شَعَرِهِ
مسند امام احمد بن حنبل · Hadith 4473
It was narrated that Ibn 'Umar said: The Messenger of Allah (PBUH) forbade qaza'. Qaza' refers to shaving part of a boy's head and leaving part of his hair.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020