What did Prophet Muhammad (saw) say about washing hair after sexual intercourse?
 This hadith is narrated by the same chain of transmitters by Ahmad al. Darimi, Zakariya b. 'Adi, Yazid, i. e. ' Ibn Zurai', Rauh b. al-Qasim, Ayyub b. Musa with the same chain of transmitters, and there is a mention of these words:                     " Should I undo the plait and wash it, because of sexual intercourse?" and there is no mention of menstruation.