Sahih al-Bukhari, Hadith 323 ⓘ
Narrated Um Salama: While I was lying with the Prophet under a woolen sheet, I got my menses. I slipped away and put on the clothes for menses. The Prophet said, "Have you got your menses?" I replied, "Yes." He called me and I slept with him under the woolen sheet.
حَدَّثَنَا مُعَاذُ بْنُ فَضَالَةَ، قَالَ حَدَّثَنَا هِشَامٌ، عَنْ يَحْيَى، عَنْ أَبِي سَلَمَةَ، عَنْ زَيْنَبَ ابْنَةِ أَبِي سَلَمَةَ، عَنْ أُمِّ سَلَمَةَ، قَالَتْ بَيْنَا أَنَا مَعَ النَّبِيِّ، صلى الله عليه وسلم مُضْطَجِعَةً فِي خَمِيلَةٍ حِضْتُ، فَانْسَلَلْتُ فَأَخَذْتُ ثِيَابَ حِيضَتِي فَقَالَ " أَنُفِسْتِ " . فَقُلْتُ نَعَمْ. فَدَعَانِي فَاضْطَجَعْتُ مَعَهُ فِي الْخَمِيلَةِ.
also referenced under: Book 6, Hadith 28 (In-Book) & Volume 1, Book 6, Hadith 320 (USC-MSA)