Sahih Bukhari Volume 3, Book 27, Hadith Number 14.
Narated By ‘Aisha : We set out with Allah’s Apostle shortly before the appearance of the new moon of Dhi-l-Hiija and he said, “Whoever wants to assume Ihram for ‘Umra may do so, and whoever wants to assume Ihram for Hajj may do so. Had not I brought the Hadi with me, I would have assumed Ihram for ‘Umra.” Some of the people assumed Ihram for ‘Umra while others for Hajj. I was amongst those who had assumed Ihram for ‘Umra. I got my menses before entering Mecca, and was menstruating till the day of ‘Arafat. I complained to Allah’s Apostle about it, he said, “Abandon your ‘Umra, undo and comb your hair, and assume Ihram for Hajj.” So, I did that accordingly. When it was the night of Hasba (day of departure from Mina), the Prophet sent ‘Abdur Rahman with me to At-Tanim.
The sub-narrator adds: He (‘AbdurRahman) let her ride behind him. And she assumed Ihram for ‘Umra in lieu of the abandoned one. ‘Aisha completed her Hajj and ‘Umra, and no Hadi, Sadaqa (charity), or fasting was obligatory for her.