Sunan an-Nasai Book 1, Hadith 196

أَخْبَرَنَا كَثِيرُ بْنُ عُبَيْدٍ، عَنْ مُحَمَّدِ بْنِ حَرْبٍ، عَنِ الزُّبَيْدِيِّ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، أَنَّ عَائِشَةَ، أَخْبَرَتْهُ أَنَّ أُمَّ سُلَيْمٍ كَلَّمَتْ رَسُولَ اللَّهِ صلى الله عليه وسلم وَعَائِشَةُ جَالِسَةٌ فَقَالَتْ لَهُ يَا رَسُولَ اللَّهِ إِنَّ اللَّهَ لاَ يَسْتَحْيِي مِنَ الْحَقِّ أَرَأَيْتَ الْمَرْأَةَ تَرَى فِي النَّوْمِ مَا يَرَى الرَّجُلُ أَفَتَغْتَسِلُ مِنْ ذَلِكَ فَقَالَ لَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ نَعَمْ ‏"‏ ‏.‏ قَالَتْ عَائِشَةُ فَقُلْتُ لَهَا أُفٍّ لَكِ أَوَتَرَى الْمَرْأَةُ ذَلِكِ فَالْتَفَتَ إِلَىَّ رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏"‏ تَرِبَتْ يَمِينُكِ فَمِنْ أَيْنَ يَكُونُ الشَّبَهُ ‏"‏ ‏.‏

It was narrated from 'Urwah that 'Aishah told him that Umm Sulaim spoke to the Messenger of Allah (ﷺ) when 'Aishah was sitting there. She said to him:"O Messenger of Allah! Allah is not shy to tell the truth. Inform me: if a women sees in a dream what men see should she perform Ghusl from that?" The Messenger of Allah (ﷺ) said to her: "Yes." 'Aishah said: "I expressed my displeasure and said: 'Does a woman see that?' The Messenger of Allah (ﷺ) turned to me and said: 'May your right hand be covered with dust! How else would (her child) resemble her?