The Messenger of Allah ﷺ used to aske our permission on the day he had to stay with one of his wives (by turns) after the following Qur'anic verse was revealed: "You may distance those whom you like, and draw close to those whom you like" [33:51]. The narrator Mu'adhah said: I said to her: What did you say to the Messenger of Allah ﷺ ? She said: I used to say: If had an option for that, I would not preferred anyone to myself.
كَانَ رَسُولُ اللَّهِ ﷺ يَسْتَأْذِنُنَا إِذَا كَانَ فِي يَوْمِ الْمَرْأَةِ مِنَّا بَعْدَ مَا نَزَلَتْ { تُرْجِي مَنْ تَشَاءُ مِنْهُنَّ وَتُؤْوِي إِلَيْكَ مَنْ تَشَاءُ } قَالَتْ مُعَاذَةُ فَقُلْتُ لَهَا مَا كُنْتِ تَقُولِينَ لِرَسُولِ اللَّهِ ﷺ قَالَتْ كُنْتُ أَقُولُ إِنْ كَانَ ذَلِكَ إِلَىَّ لَمْ أُوثِرْ أَحَدًا عَلَى نَفْسِي