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 [1]‏ .‏