Sahih al-Bukhari 312
صحيح البخاري#312Sahihحَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا إِبْرَاهِيمُ بْنُ نَافِعٍ، عَنِ ابْنِ أَبِي نَجِيحٍ، عَنْ مُجَاهِدٍ، قَالَ قَالَتْ عَائِشَةُ مَا كَانَ لإِحْدَانَا إِلاَّ ثَوْبٌ وَاحِدٌ تَحِيضُ فِيهِ، فَإِذَا أَصَابَهُ شَىْءٌ مِنْ دَمٍ، قَالَتْ بِرِيقِهَا فَقَصَعَتْهُ بِظُفْرِهَا.
Narrated `Aisha:None of us had more than a single garment and we used to have our menses while wearing it. Whenever it got soiled with blood of menses we used to apply saliva to the blood spot and rub off the blood with our nails
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:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 6:17