(5) باب صفة الحج ودخول مكة
Ibn Abbas (RAA) narrated that the Messenger of Allah (ﷺ) said:
"Women (pilgrims) do not have to shave (their heads); they may only shorten their hair." Related by Abu Dawud with a good chain of narrators.
Reference: Bulugh al-Maram 769
In-book reference: Book 6, Hadith 61
English translation: Book 6, Hadith 788