Yahya related to me from Malik from Nafi that Abdullah ibn Umar
used to say, "A woman in ihram should not comb her hair when she
leaves ihram until she has cut some of the tresses of her hair, and if
she has an animal for sacrifice with her she should not cut off any of
her hair until the animal has been killed."
Muwatta Malik Book 20, Hadith 175