Um Salama said, "Um Sulaim said, 'O Messenger of Allah ﷺ! Allah does not refrain from saying the truth! Is it obligatory for a woman to take a bath after she gets nocturnal discharge?' He said, 'Yes, if she notices the water (i.e. discharge).' Um Salama smiled and said, 'Does a woman get discharge?' Allah's Apostle said. 'Then why does a child resemble (its mother)?" (Using translation from Bukhārī 3328)  

يَا رَسُولَ اللهِ إِنَّ اللهَ لَا يَسْتَحْيِي مِنَ الْحَقِّ عَلَى الْمَرْأَةِ غُسْلٌ إِذَا احْتَلَمَتْ؟ قَالَ «نَعَمْ إِذَا رَأَتِ الْمَاءَ» فَضَحِكَتْ أُمُّ سَلَمَةَ فَقَالَتْ أَتَحْتَلِمُ الْمَرْأَةُ؟ فَقَالَ رَسُولُ اللهِ ﷺ «فَفِيمَ يُشْبِهُ الْوَلَدُ؟»