Sahih Muslim Book 3, Hadith Number 651.

Chapter : The desirability of using musk at the spot of blood while bathing after menstruation.

‘Aisha reported: Asma’ b. Shakal came to the Messenger of Allah (may peace be upon him) and said: Messenger of Allah, how one amongst us should take a bath after the menstruation, and the rest of the Hadith is the same and there is no mention of bathing because of sexual intercourse.