Sahih Muslim 334 a
'A'isha reported:
Umm Habiba b. Jahsh thus asked for a verdict from the Messenger of Allah (ﷺ): I am a woman whose blood keeps flowing (after the menstrual period). He (the Holy Prophet) said: That is only a vein, so take a bath and offer prayer; and she took a bath at the time of every prayer. Laith b. Sa'd said: Ibn Shihab made no mention that the Messenger of Allah (ﷺ) had ordered her to take a bath at the time of every prayer, but she did it of her own accord. And in the tradition transmitted by Ibn Rumh there is no mention of Umm Habiba (and there is mention of the daughter of Jahsh only.)
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا لَيْثٌ، ح وَحَدَّثَنَا مُحَمَّدُ بْنُ رُمْحٍ، أَخْبَرَنَا اللَّيْثُ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّهَا قَالَتِ اسْتَفْتَتْ أُمُّ حَبِيبَةَ بِنْتُ جَحْشٍ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَتْ إِنِّي أُسْتَحَاضُ ‏.‏ فَقَالَ ‏
"‏ إِنَّمَا ذَلِكِ عِرْقٌ فَاغْتَسِلِي ثُمَّ صَلِّي ‏"‏ ‏.‏ فَكَانَتْ تَغْتَسِلُ عِنْدَ كُلِّ صَلاَةٍ ‏.‏ قَالَ اللَّيْثُ بْنُ سَعْدٍ لَمْ يَذْكُرِ ابْنُ شِهَابٍ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم أَمَرَ أُمَّ حَبِيبَةَ بِنْتَ جَحْشٍ أَنْ تَغْتَسِلَ عِنْدَ كُلِّ صَلاَةٍ وَلَكِنَّهُ شَىْءٌ فَعَلَتْهُ هِيَ ‏.‏ وَقَالَ ابْنُ رُمْحٍ فِي رِوَايَتِهِ ابْنَةُ جَحْشٍ وَلَمْ يَذْكُرْ أُمَّ حَبِيبَةَ ‏.‏