What did the Prophet Muhammad (saw) say when he found out Umm Salama (peace be upon her) had started her menstruation while lying with him in bed?
 Umm Salama reported:                      While I was lying with the Messenger of Allah (may peace be upon him) in a bed cover I menstruated, so I slipped away and I took up the clothes (which I wore) in menses. Upon this the Messenger of Allah (may peace be upon him) said: Have you menstruated? I said: Yes. He called me and I lay down