"We would menstruate during the time of the Messenger of Allah, then when we became pure we were ordered to make up the fasts but we were not ordered to make up the Salat."  

كُنَّا نَحِيضُ عَلَى عَهْدِ رَسُولِ اللَّهِ ﷺ ثُمَّ نَطْهُرُ فَيَأْمُرُنَا بِقَضَاءِ الصِّيَامِ وَلاَ يَأْمُرُنَا بِقَضَاءِ الصَّلاَةِ