عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كُنْتُ أُرَجِّلُ رَأْسَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَأَنَا حَائِض

Ibn ‘Umar told that when the Prophet 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.