Sunan an-Nasa'i
Sunan an-Nasa'i 355
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ سُلَيْمَانَ بْنِ يَسَارٍ، عَنْ أُمِّ سَلَمَةَ، أَنَّ امْرَأَةً، كَانَتْ تُهَرَاقُ الدَّمَ عَلَى عَهْدِ رَسُولِ اللَّهِ صلى الله عليه وسلم اسْتَفْتَتْ لَهَا أُمُّ سَلَمَةَ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَ " لِتَنْظُرْ عَدَدَ اللَّيَالِي وَالأَيَّامِ الَّتِي كَانَتْ تَحِيضُ مِنَ الشَّهْرِ قَبْلَ أَنْ يُصِيبَهَا الَّذِي أَصَابَهَا فَلْتَتْرُكِ الصَّلاَةَ قَدْرَ ذَلِكَ مِنَ الشَّهْرِ فَإِذَا خَلَّفَتْ ذَلِكَ فَلْتَغْتَسِلْ ثُمَّ لْتَسْتَثْفِرْ بِالثَّوْبِ ثُمَّ لْتُصَلِّي " .
Qutaybah narrated to us, from Malik, from Nafi', from Sulayman ibn Yasar, from Umm Salamah, that a woman was bleeding during the time of the Messenger of Allah (ﷺ). Umm Salamah sought a ruling for her from the Messenger of Allah (ﷺ), who said: 'Let her consider the number of nights and days she used to menstruate each month before this began, and let her stop praying for that length of time each month. When that time has passed, let her perform ghusl, bind herself with a cloth, and pray.'
Translation notes
The Arabic chain is included. The instructions specify the woman's usual menstrual duration before the irregular bleeding began, followed by ghusl, binding with a cloth, and prayer.
أَخْبَرَنَا قُتَيْبَةُ،
The English witness omits the chain present in Arabic.
Please verify the chain against the Arabic source.