Humayd al-Himyari reported: I met a person (among the Companion of Prophet) who remained in the company of the Prophet ﷺfor four years as AbuHurayrah remained in his company. He reported: The Messenger of Allah ﷺ forbade that the female should wash with the water left over by the male, and that the male should wash with the left-over of the female. The version of Musaddad adds: "That they both take the handful of water together." (Using translation from Abū Dāʾūd 81)
لَقِيتُ رَجُلًا صَحِبَ النَّبِيَّ ﷺ كَمَا صَحِبَهُ أَبُو هُرَيْرَةَ أَرْبَعَ سِنِينَ قَالَ نَهَانَا رَسُولُ اللهِ ﷺ أَنْ يَتَمَشَّطَ أَحَدُنَا كُلَّ يَوْمٍ أَوْ يَبُولَ فِي مُغْتَسَلِهِ أَوْ تَغْتَسِلَ الْمَرْأَةُ بِفَضْلِ الرَّجُلِ أَوْ يَغْتَسِلَ الرَّجُلُ بِفَضْلِ الْمَرْأَةِ وَلْيَغْتَرِفَا جَمِيعًا