Sahih Muslim Book 003, Hadith Number 0578.

Chapter : Lying with one in menstruation above the waist wrapper.

'Aisha reported: When anyone amongst us was menstruating the Messenger of Allah (may peace be upon him) asked her to tie waist-wrapper daring the time when the menstrual blood profusely flowed and then embraced her; and she ('Aisha) observed: And who amongst you can have control over his desires as the Messenger of Allah (may peace be upon him) had over his desires.