صَحِيحُ مُسْلِمٍ
Sahih Muslim 312
The Book of Menstruation
Women are obliged to perform ghusl if they emit fluid
حَدَّثَنَا دَاوُدُ بْنُ رُشَيْدٍ، حَدَّثَنَا صَالِحُ بْنُ عُمَرَ، حَدَّثَنَا أَبُو مَالِكٍ الأَشْجَعِيُّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ سَأَلَتِ امْرَأَةٌ رَسُولَ اللَّهِ صلى الله عليه وسلم عَنِ الْمَرْأَةِ تَرَى فِي مَنَامِهَا مَا يَرَى الرَّجُلُ فِي مَنَامِهِ فَقَالَ إِذَا كَانَ مِنْهَا مَا يَكُونُ مِنَ الرَّجُلِ فَلْتَغْتَسِلْ .
Anas b. Malik reported: A woman asked the Messenger of Allah (ﷺ) about a woman who sees in her dream what a man sees in his dream (sexual dream). He (the Prophet) said: If she experiences what a man experiences, she should take a bath.
Sahih Muslim, 312Sahihصحيح