Hadith 4:474
Muhammad ibn Abi ‘Adi narrated to us, from Ash’ath, from al-Hasan, regarding a woman who menstruated after the sun had turned yellow during Ramadan: He said, "She breaks her fast." He said, "And if she woke up menstruating, then became pure after the break of dawn, she should not eat for the remainder of her day."
حدثنا محمد بن أبي عدي عن أشعث عن الحسن في المرأة حاضت بعد ما اصفرت الشمس في رمضان قال تفطر قال وإن أصبحت حائضا فطهرت بعد طلوع الفجر قال لا تأكل بقية يومها