Narrated Humayd al-Himyari:

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."

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، عَنْ دَاوُدَ بْنِ عَبْدِ اللَّهِ، ح وَحَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ دَاوُدَ بْنِ عَبْدِ اللَّهِ، عَنْ حُمَيْدٍ الْحِمْيَرِيِّ، قَالَ لَقِيتُ رَجُلاً صَحِبَ النَّبِيَّ ﷺ أَرْبَعَ سِنِينَ كَمَا صَحِبَهُ أَبُو هُرَيْرَةَ قَالَ نَهَى رَسُولُ اللَّهِ ﷺ أَنْ تَغْتَسِلَ الْمَرْأَةُ بِفَضْلِ الرَّجُلِ أَوْ يَغْتَسِلَ الرَّجُلُ بِفَضْلِ الْمَرْأَةِ - زَادَ مُسَدَّدٌ - وَلْيَغْتَرِفَا جَمِيعًا .