Sunan Abi Dawud 302
سنن أبي داود#302Da'ifحَدَّثَنَا أَحْمَدُ بْنُ حَنْبَلٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ مُحَمَّدِ بْنِ أَبِي إِسْمَاعِيلَ، - وَهُوَ مُحَمَّدُ بْنُ رَاشِدٍ - عَنْ مَعْقِلٍ الْخَثْعَمِيِّ، عَنْ عَلِيٍّ، - رضى الله عنه - قَالَ الْمُسْتَحَاضَةُ إِذَا انْقَضَى حَيْضُهَا اغْتَسَلَتْ كُلَّ يَوْمٍ وَاتَّخَذَتْ صُوفَةً فِيهَا سَمْنٌ أَوْ زَيْتٌ .
Narrated Ali ibn AbuTalib: The woman who has a prolonged flow of blood should wash herself every day when her menstrual period is over and take a woollen cloth greased with fat or oil (to tie over the private parts)
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:
In-book reference: 1:302