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.  

سُئِلَ رَسُولُ اللَّهِ ﷺ عَنِ الرَّجُلِ يَجِدُ الْبَلَلَ وَلاَ يَذْكُرُ احْتِلاَمًا قَالَ يَغْتَسِلُ وَعَنِ الرَّجُلِ يَرَى أَنَّهُ قَدِ احْتَلَمَ وَلاَ يَجِدُ الْبَلَلَ قَالَ لاَ غُسْلَ عَلَيْهِ فَقَالَتْ أُمُّ سُلَيْمٍ الْمَرْأَةُ تَرَى ذَلِكَ أَعَلَيْهَا غُسْلٌ قَالَ نَعَمْ إِنَّمَا النِّسَاءُ شَقَائِقُ الرِّجَالِ  

"The Prophet was asked about a man who finds wetness and he does not remember having a wet dream. So he said: 'He is to perform Ghusl. And (he was asked) about a man who had a wet dream but does not find any wetness, so he said: 'No Ghusl is required of him.' Umm Salamah said: 'O Messenger of Allah! Is the woman required to perform Ghusl if she sees that?' He replied: 'Yes. Indeed women are the partners of men.'"  

سُئِلَ رَسُولُ اللَّهِ ﷺ عَنِ الرَّجُلِ يَجِدُ الْبَلَلَ وَلاَ يَذْكُرُ احْتِلاَمًا قَالَ يَغْتَسِلُ وَعَنِ الرَّجُلِ يَرَى أَنَّهُ قَدِ احْتَلَمَ وَلَمْ يَجِدْ بَلَلاً قَالَ لاَ غُسْلَ عَلَيْهِ قَالَتْ أُمُّ سَلَمَةَ يَا رَسُولَ اللَّهِ هَلْ عَلَى الْمَرْأَةِ تَرَى ذَلِكَ غُسْلٌ قَالَ نَعَمْ إِنَّ النِّسَاءَ شَقَائِقُ الرِّجَالِ  

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. (Using translation from Abū Dāʾūd 236)  

سُئِلَ رَسُولُ اللهِ ﷺ عَنِ الرَّجُلِ يَجِدُ الْبَلَلَ وَلَا يَذْكُرُ احْتِلَامًا قَالَ يَغْتَسِلُ وَعَنِ الرَّجُلِ يَرَىأَنَّهُ قَدِ احْتَلَمَ وَلَا يَرَى بَلَلًا قَالَ لَا غُسْلَ عَلَيْهِ فَقَالَتْ أُمُّ سُلَيْمٍ هَلْ عَلَى الْمَرْأَةِ تَرَى ذَلِكَ شَيْءٌ؟ قَالَ نَعَمْ إِنَّمَا النِّسَاءُ شَقَائِقُ الرِّجَالِ  

[Machine] The Messenger of Allah ﷺ was asked about a person who sees semen in his dream but does not remember having a wet dream. He replied, "He should perform ghusl (ritual bath) even if he thinks he had a wet dream but did not see any semen."  

سُئِلَ رَسُولُ اللهِ ﷺ عَنِ الرَّجُلِ يَرَى فِي الْمَنَامِ الْبَلَلَ وَلَا يَذْكُرُ احْتِلَامًا؟ قَالَ يَغْتَسِلُ وَإِنْ رَأَى أَنَّهُ احْتَلَمَ وَلَمْ يَرَ بَلَلًا فَلَا غُسَلَ عَلَيْهِ