عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كُنْتُ أُرَجِّلُ رَأْسَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَأَنَا حَائِض

Anas said they were told not to let more than forty days elapse between the times they clipped the moustache, pared the nails, plucked out hairs under the armipits and shaved the pubes. Muslim transmitted it.