Sahih Bukhari – Hadith No : 1787

Narrated Ibn `Abbas: A menstruating woman was allowed to leave Mecca if she had done Tawaf-al-Ifada. Tawus (a subnarrator) said from his father, “I heard Ibn `Umar saying that she would not depart. Then later I heard him saying that the Prophet had allowed them (menstruating women) to depart.”

Hadith In Arabic Text :

حدثنا مسلم، حدثنا وهيب، حدثنا ابن طاوس، عن أبيه، عن ابن عباس رضى الله عنهما قال رخص للحائض أن تنفر إذا أفاضت‏.‏ قال وسمعت ابن عمر، يقول إنها لا تنفر‏.‏ ثم سمعته يقول بعد إن النبي صلى الله عليه وسلم رخص لهن‏.‏

Chapter : Hajj (Pilgrimage) – كتاب الحج