Yahya related to me from Malik from Hisham ibn Urwa that Fatima bint al-Mundhir said, "We used to veil our faces when we were in ihram in the company of Asma bint Abi Bakr as-Siddiq."

20.7 Wearing Perfume during Hajj.
Muwatta Malik Book 20, Hadith 18