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.
Reported by Ahmad (No. 5358). Cited in Mishkat al-Masabih (No. 4427).
Ibn ‘Umar (may Allah be pleased with him) reported: The Messenger of Allah (may Allah’s peace and blessings be upon him) saw a boy who had part of his head shaved and part left unshaven, so he forbade them from doing this, and said: "Shave it all or leave it all."