Narrated Ibn `Abbas: The Prophet was asked about a person who had his head shaved before slaughtering (his Hadi) (or other similar ceremonies of Hajj). He replied, "There is no harm, there is no harm."
Hadith ReferenceSahih Bukhari / The Book of Hajj / Hadith: 1721
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة