Sunan an-Nasa'i 376
سنن النسائي#376Sahihأَخْبَرَنَا الْحَارِثُ بْنُ مِسْكِينٍ، قِرَاءَةً عَلَيْهِ وَأَنَا أَسْمَعُ، عَنِ ابْنِ وَهْبٍ، عَنْ يُونُسَ، وَاللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ حَبِيبٍ، مَوْلَى عُرْوَةَ عَنْ بُدَيَّةَ، - وَكَانَ اللَّيْثُ يَقُولُ نَدَبَةَ - مَوْلاَةِ مَيْمُونَةَ عَنْ مَيْمُونَةَ قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُبَاشِرُ الْمَرْأَةَ مِنْ نِسَائِهِ وَهِيَ حَائِضٌ إِذَا كَانَ عَلَيْهَا إِزَارٌ يَبْلُغُ أَنْصَافَ الْفَخِذَيْنِ وَالرُّكْبَتَيْنِ فِي حَدِيثِ اللَّيْثِ تَحْتَجِزُ بِهِ .
It was narrated that Maimunah said:"The Messenger of Allah (ﷺ) would fondle one of his wives when she was menstruating, if she wore and Izar (waist wrap) that reached halfway down her thighs or to her knees
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: 3:28