It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he said: "A menstruating woman has been given a concession: if her period starts (after Tawaf al-Ifadah), she may depart (without performing the farewell tawaf)."
Ata (may Allah have mercy on him) said: "We heard Sayyiduna Ibn Umar (may Allah be pleased with them both), at first, saying: 'She should not depart.' Then later he said (retracting it): 'She may depart; indeed, the Messenger of Allah (peace and blessings be upon him) has granted her the concession to depart.'"
Hadith Referenceالمعجم الأوسط / باب الألف / 2654
Hadith Takhrij«أخرجه البخاري فى «صحيحه» برقم: 329، 1760، وابن حبان فى «صحيحه» برقم: 3898، والنسائي فى «السنن الكبرى» برقم: 4186، والدارمي فى «مسنده» برقم: 1975، والبيهقي فى «السنن الكبرى» برقم: 9862، والطحاوي فى «شرح معاني الآثار» برقم: 4067، والطبراني فى «الكبير» برقم: 11448»