Sunan Ibn Majah, Book 1, Hadith 680 (In-Book) ⓘ

It was narrated that Umm Salamah said: "I was with the Messenger of Allah under his blanket, then I felt that I was menstruating as women do, so I slipped out from under the cover. The Messenger of Allah said: 'Are you menstruating?' I said: 'I feel that I am menstruating as women do.' He said: 'That is what Allah has decreed for the daughters of Adam.' So I slipped out and sorted myself out, then I came back, and the Messenger of Allah said to me: 'Come under the cover with me,' so I went in with him.'"

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا مُحَمَّدُ بْنُ بِشْرٍ، حَدَّثَنَا مُحَمَّدُ بْنُ عَمْرٍو، حَدَّثَنَا أَبُو سَلَمَةَ، عَنْ أُمِّ سَلَمَةَ، قَالَتْ كُنْتُ مَعَ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ فِي لِحَافِهِ فَوَجَدْتُ مَا تَجِدُ النِّسَاءُ مِنَ الْحَيْضَةِ فَانْسَلَلْتُ مِنَ اللِّحَافِ فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ أَنَفِسْتِ ‏"‏ ‏.‏ قُلْتُ وَجَدْتُ مَا تَجِدُ النِّسَاءُ مِنَ الْحَيْضَةِ ‏.‏ قَالَ ‏"‏ ذَلِكَ مَا كَتَبَ اللَّهُ عَلَى بَنَاتِ آدَمَ ‏"‏ ‏.‏ قَالَتْ فَانْسَلَلْتُ فَأَصْلَحْتُ مِنْ شَأْنِي ثُمَّ رَجَعْتُ فَقَالَ لِي رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ تَعَالَىْ فَادْخُلِي مَعِي فِي اللِّحَافِ ‏"‏ ‏.‏ قَالَتْ فَدَخَلْتُ مَعَهُ ‏.‏