Sunan Abi Dawud 256
سنن أبي داود#256Da'ifحَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرِ بْنِ زِيَادٍ، حَدَّثَنَا شَرِيكٌ، عَنْ قَيْسِ بْنِ وَهْبٍ، عَنْ رَجُلٍ، مِنْ بَنِي سُوَاءَةَ بْنِ عَامِرٍ عَنْ عَائِشَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ كَانَ يَغْسِلُ رَأْسَهُ بِالْخِطْمِيِّ وَهُوَ جُنُبٌ يَجْتَزِئُ بِذَلِكَ وَلاَ يَصُبُّ عَلَيْهِ الْمَاءَ .
Aishah said:The Messenger of Allah (May peace be upon him) used to wash his head with marsh-mallow while he was sexually defiled. It was sufficient for him and he did not pour water upon it
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: 1:256