The Book of Menstruation and Istihadah
كتاب الحيض والاستحاضة
Read the English translation first, with the original Arabic directly underneath.
How To Interact With A Menstruating Woman And The Interpretation Of The Saying Of Allah: They Ask You Concerning Menstruation. Say: "That Is An Adha (A Harmful Thing), Therefore, Keep Away From Women During Menses And Go Not Unto Them Till They Are Purified." [1]
It was narrated from 'Aishah that Umm Habibah bint Jahsh who was married to 'Abdur-Rahman bin 'Awf suffered from Istihadah and did not become pure. Her situation was mentioned to the Messenger of Allah (ﷺ) and he said:
"That is not menstruation, rather it is a kick in the womb, so let her work out the length of the menses that she used to have, and stop praying (for that period of time), then after that let her perform Ghusl for every for every prayer."
لَيْسَتْ بِالْحِيضَةِ وَلَكِنَّهَا رَكْضَةٌ مِنَ الرَّحِمِ لِتَنْظُرْ قَدْرَ قُرْئِهَا الَّتِي كَانَتْ تَحِيضُ لَهَا فَلْتَتْرُكِ الصَّلاَةَ ثُمَّ تَنْظُرْ مَا بَعْدَ ذَلِكَ فَلْتَغْتَسِلْ عِنْدَ كُلِّ صَلاَةٍ