´It was narrated from Ibn 'Umar that :` The Prophet [SAW] saw a boy, part of whose head had been shaven and part had been left. He forbade that and said: "Shave all of it, or leave all of it."
Hadith Referenceسنن نسائي / كتاب الزينة من السنن / 5051
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم