Hadith 1:8
A man who accompanied the prophet (ﷺ) narrated:
Allah’s Messenger (ﷺ) forbade a women to bathe with the water left over by a man and that a man should not bathe with the water left over by a woman (but instead) they should both take scoopfuls of the water together. [Reported by Abu Da’ud and An-Nasa’i and its chain of narrators is Sahih (authentic)].
وَعَنْ رَجُلٍ صَحِبَ اَلنَّبِيَّ - صلى الله عليه وسلم -قَالَ: { نَهَى رَسُولُ اَللَّهِ - صلى الله عليه وسلم -"أَنْ تَغْتَسِلَ اَلْمَرْأَةُ بِفَضْلِ اَلرَّجُلِ, أَوْ اَلرَّجُلُ بِفَضْلِ اَلْمَرْأَةِ, وَلْيَغْتَرِفَا جَمِيعًا } أَخْرَجَهُ أَبُو دَاوُدَ. وَالنَّسَائِيُّ, وَإِسْنَادُهُ صَحِيحٌ (12)
Original Reference: Bulugh al-Maram 7