The woman having bleeding after delivery (puerperal haemorrhage) would refrain (from prayer) for forty days or forty nights; and we would anoint our faces with an aromatic herb called wars to remove dark spots.  

كَانَتِ النُّفَسَاءُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ تَقْعُدُ بَعْدَ نِفَاسِهَا أَرْبَعِينَ يَوْمًا أَوْ أَرْبَعِينَ لَيْلَةً وَكُنَّا نَطْلِي عَلَى وُجُوهِنَا الْوَرْسَ يَعْنِي مِنَ الْكَلَفِ  

I performed Hajj and came to Umm Salamah and said (to her): Mother of the believers, Samurah b. Jundub commands women to complete the prayers abandoned during their menstrual period. She said: They should not do so. The wives of the Prophet ﷺ would refrain (from prayer) for forty nights (i.e. days) during the course of bleeding after child birth. The Prophet ﷺ would not command them to complete the prayers abandoned during the period of bleeding. Muhammad b. Hatim said: The name of Al-Azdiyyah is Mussah and her patronymic name is Umm Busrah. Abu Dawud said: The patronymic names of Kathir b. Ziyad s Abu Sahl.  

لاَ يَقْضِينَ كَانَتِ الْمَرْأَةُ مِنْ نِسَاءِ النَّبِيِّ ﷺ تَقْعُدُ فِي النِّفَاسِ أَرْبَعِينَ لَيْلَةً لاَ يَأْمُرُهَا النَّبِيُّ ﷺ بِقَضَاءِ صَلاَةِ النِّفَاسِ قَالَ مُحَمَّدٌ يَعْنِي ابْنَ حَاتِمٍ وَاسْمُهَا مُسَّةُ تُكْنَى أُمَّ بُسَّةَ