[Machine] The Prophet ﷺ said, "When it is the blood of menstruation, it is known to be black. So if it is that, then refrain from prayer. And when it is the other one, then perform ablution and pray, as it is only a vein." Ibn Al-Muthanna said, "Ibn Abi Adi mentioned this in his book like this, then he mentioned it again after memorizing it." Muhammad bin Amr narrated from Az-Zuhri from Urwah from Aisha that Fatimah used to experience postpartum bleeding, and he mentioned its meaning.
لَهَا النَّبِيُّ ﷺ إِذَا كَانَ دَمُ الْحَيْضِ فَإِنَّهُ دَمٌ أَسْوَدُ يُعْرَفُ فَإِذَا كَانَ ذَلِكَ فَأَمْسِكِي عَنِ الصَّلَاةِ وَإِذَا كَانَ الْآخَرُ فَتَوَضَّئِي وَصَلِّي فَإِنَّمَا هُوَ عِرْقٌ قَالَ ابْنُ الْمُثَنَّى حَدَّثَنَا بِهِ ابْنُ أَبِي عَدِيٍّ مِنْ كِتَابِهِ هَكَذَا ثُمَّ حَدَّثَنَا بَعْدُ حِفْظًا قَالَ ثنا مُحَمَّدُ بْنُ عَمْرٍو عَنِ الزُّهْرِيِّ عَنْ عُرْوَةَ عَنْ عَائِشَةَ أَنَّ فَاطِمَةَ كَانَتْ تُسْتَحَاضُ فَذَكَرَ مَعْنَاهُ