The Prophet (ﷺ) said about the woman having a prolonged flow of blood: She should abandon prayer during her menstrual period: then she should take a bath and pray. She should perform ablution for every prayer.
Abu Dawud said: 'Uthman added: She should keep fast and pray.
Reference: Sunan Abi Dawud 297 In-book : Book 1, Hadith 297 English translation : Book 1, Hadith 297
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