Fatimah daughter of AbuHubaysh came to the Prophet (ﷺ) and narrated what happened with her. He said: Then take a bath and then perform ablution for every prayer and pray.
Sunan Abi Dawud Book 1, Hadith 298
← Previous Hadith 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.

Sunan Abi Dawud Book 1, Hadith 297 Next Hadith → She should take bath, i.e. only once; then she should perform ablution until he next menstrual period.

Sunan Abi Dawud Book 1, Hadith 299