(50) باب الْحَيَاءِ فِي الْعِلْمِ
Narrated Um Salama:
Um-Sulaim came to Allah's Messenger (ﷺ) and said, "Verily, Allah is not shy of (telling you) the truth. Is it necessary for a woman to take a bath after she has a wet dream (nocturnal sexual discharge?) The Prophet replied, "Yes, if she notices a discharge." Um Salama, then covered her face and asked, "O Allah's Messenger (ﷺ)! Does a woman get a discharge?" He replied, "Yes, let your right hand be in dust (An Arabic expression you say to a person when you contradict his statement meaning "you will not achieve goodness"), and that is why the son resembles his mother."
Reference: Sahih al-Bukhari 130
In-book reference: Book 3, Hadith 72
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 3, Hadith 132