The Prophet (ﷺ) was asked about a person who found moisture (on his body or clothes) but did not remember the sexual dream. He replied: He should take a bath. He was asked about a person who remembered that he had a sexual dream but did not find moisture. He replied: Bath is not necessary for him. Umm Salamah then asked: Is washing necessary for a woman if she sees that (in her dream)? He replied: Yes. Woman are counterpart of men.
Reference: Sunan Abi Dawud 236 In-book : Book 1, Hadith 236 English translation : Book 1, Hadith 236
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