Sunan Abi Dawud 299
سنن أبي داود#299Sahihحَدَّثَنَا أَحْمَدُ بْنُ سِنَانٍ الْقَطَّانُ الْوَاسِطِيُّ، حَدَّثَنَا يَزِيدُ، عَنْ أَيُّوبَ بْنِ أَبِي مِسْكِينٍ، عَنِ الْحَجَّاجِ، عَنْ أُمِّ كُلْثُومٍ، عَنْ عَائِشَةَ، فِي الْمُسْتَحَاضَةِ تَغْتَسِلُ - تَعْنِي مَرَّةً وَاحِدَةً - ثُمَّ تَوَضَّأُ إِلَى أَيَّامِ أَقْرَائِهَا .
Aishah said about the woman who has a prolonged flow of blood:She should take bath, i.e. only once; then she should perform ablution until he next menstrual period
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 1:299