Muwatta Malik #790

Yahya related to me from Malik, from Nafi, that Abdullah ibn Umar used to say, "A menstruating woman who wants to go into ihram to do either hajj or umra can do so if she so wishes, but she cannot do tawaf of the House, nor the say between Safa and Marwa. She can participate in all the rituals along with everybody else, except that she cannot do tawaf of the House, nor the say between Safa and Marwa, nor can she come near the mosque until she is pure."