It was narrated from 'Aishah:
A woman asked the Prophet (ﷺ): 'O Messenger of Allah, how should I perform Ghusl when I become pure?' He said: 'Take a piece of cotton wool scented with musk and clean yourself with it.' She said: 'How should I clean myself with it?' He said: 'Clean yourself with it.' She said: How should I clean myself with it?' The Messenger of Allah (ﷺ) said: 'Subhan Allah!' and turned away from her. 'Aishah understood what the Messenger of Allah (ﷺ) meant, and said: So I pulled her toward me and told her what the Messenger of Allah (ﷺ) meant.