Abu Ali Al-Azdi narrated that I heard Ibn Umar (may Allah be pleased with them both) saying to the one shaving his head: O boy, shave till the bone, and when you cut the hair, start from the right side before the left side.
Hadith Referenceمسند الإمام الشافعي / كتاب الحج / 1016
Hadith Takhrijإسنادہ ضعیف لعدم متابعۃ الأزدی أخرجہ البیہقی: 5 / 103 - وابن ابی شیبہ (14562، 14564)۔