Sahih al-Bukhari 1674

It is related that 'A'isha said, "We set out with the Messenger of Allah, may Allah bless him and grant him peace, just before the new moon of Dhu'l-Hijja. He said, 'Any of you who want to go into ihram for 'umra should do so and those who want to go into ihram for hajj should go into it for hajj. If I had not brought a sacrifice with me, I would have gone into ihram for 'umra.' Some people went into ihram for 'umra and some of them went into ihram for hajj. I was one of those who went into ihram for 'umra. I started menstruating before I entered Makka. When the day of 'Arafa came, I was still menstruating, so I complained to the Prophet, may Allah bless him and grant him peace, and he said, 'Leave your 'umra, unbraid your hair and comb it and go into ihram for hajj.' I did that. On the night of the 13th, he sent 'Abdu'r-Rahman with me to at-Tan'im." He let her ride behind him and she went into ihram for 'umra to compensate for her other 'umra so Allah fulfilled both her hajj and 'umra. She was not required to sacrifice nor to give sadaqa nor to fast. VIII: The reward of the 'umra is according to the effort exerted