عَنِ ابْنِ عُمَرَ أَيْضًا رَضِيَ اللَّهُ عَنْهُمَا أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ رَأَى صَبِيًّا قَدْ حُلِقَ بَعْضُ شَعْرِهِ وَتُرِكَ بَعْضُهُ فَنَهَى عَنْ ذَلِكَ وَقَالَ احْلِقُوا كُلَّهُ أَوِ اتْرُكُوا كُلَّهُ
Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) saw a child whose head had some hair shaved and some left unshaved. The Prophet (peace and blessings be upon him) said: Shave the entire head or leave the entire head.