(7) باب وُجُوبِ الْغُسْلِ عَلَى الْمَرْأَةِ بِخُرُوجِ الْمَنِيِّ مِنْهَا
Anas b. Malik reported:
A woman asked the Messenger of Allah (way peace be upon him) about a woman who sees in her dream what a man sees in his dream (sexual dream). He (the Holy Prophet) said: If she experiences what a man experiences, she should take a bath.
Reference: Sahih Muslim 312
In-book reference: Book 3, Hadith 33
USC-MSA web (English) reference(deprecated numbering scheme): Book 3, Hadith 609