Full Sharh — Bulugh al-Maram 169
وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا; { أَنَّ أُمَّ حَبِيبَةَ بِنْتَ جَحْشٍ شَكَتْ إِلَى رَسُولِ اَللَّهِ - صلى الله عليه وسلم -اَلدَّمَ, فَقَالَ: "اُمْكُثِي قَدْرَ مَا كَانَتْ تَحْبِسُكِ حَيْضَتُكِ, ثُمَّ اِغْتَسِلِي" فَكَانَتْ تَغْتَسِلُ كُلَّ صَلَاةٍ } رَوَاهُ مُسْلِم ٌ 1 .1 - صحيح. رواه مسلم (334) (66).
English Translation
Narrated `A'ishah (RAA):: Umm Habiba bint Jahsh complained to Allah's Messenger (Peace be upon him) about a prolonged flow of blood. He said to her, "Keep away (from prayer) as long as your normal period used to prevent you (from praying), and afterwards she should perform Ghusl (and pray)". (She used to take a bath for every prayer).
Source
Bulugh al-Maram(بلوغ المرام)
The Book of Purification
Hadith Number
169