حَدَّثَنَا يَحْيَى عَنْ عُبَيْدِ اللَّهِ أَخْبَرَنِي عُمَرُ بْنُ نَافِعٍ عَنْ أَبِيهِ عَنِ ابْنِ عُمَرَ قَالَ نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ الْقَزَعِ قُلْتُ وَمَا الْقَزَعُ قَالَ أَنْ يُحْلَقَ رَأْسُ الصَّبِيِّ وَيُتْرَكَ بَعْضُهُ
مسند امام احمد بن حنبل · Hadith 5175
It was narrated that Ibn 'Umar said: The Messenger of Allah (PBUH) forbade qaza. I (the narrator) said: What is qaza? He said: shaving part of a boy’s head and leaving part.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020