Sunan Abi Dawud, Hadith 358 ⓘ
'Aishah said: Each of us (wives of the Prophet) had only one clothe in which she would menstruate. Whenever it was smeared with blood, she would moisten it with her saliva and scratch it with saliva.
حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ الْعَبْدِيُّ، أَخْبَرَنَا إِبْرَاهِيمُ بْنُ نَافِعٍ، قَالَ سَمِعْتُ الْحَسَنَ، - يَعْنِي ابْنَ مُسْلِمٍ - يَذْكُرُ عَنْ مُجَاهِدٍ، قَالَ قَالَتْ عَائِشَةُ مَا كَانَ لإِحْدَانَا إِلاَّ ثَوْبٌ وَاحِدٌ تَحِيضُ فِيهِ فَإِنْ أَصَابَهُ شَىْءٌ مِنْ دَمٍ بَلَّتْهُ بِرِيقِهَا ثُمَّ قَصَعَتْهُ بِرِيقِهَا .
also referenced under: Hadith 358 (DarusSalam) & Book 1, Hadith 358 (USC-MSA)