The Prophet went around to all of his wives in one night, and he had a bath after each one of them. It was said to him: "O Messenger of Allah, why not make it one bath?" He said: "This is purer, better and cleaner." (Using translation from Ibn Mājah 590)
أَنَّ النَّبِيَّ ﷺ طَافَ عَلَى نِسَائِهِ جَمَعَ فِي يَوْمٍ وَاحِدٍ وَاغْتَسَلَ عِنْدَ كُلِّ وَاحِدَةٍ مِنْهُنَّ غُسْلًا فَقُلْتُ يَا رَسُولَ اللهِ أَلَا تَجْعَلُهُ غُسْلًا وَاحِدًا؟ فَقَالَ إِنَّ هَذَا أَزْكَى وَأَطْهَرُ وَأَطْيَبُ