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. (Using translation from Abū Dāʾūd 2136)
كَانَ النَّبِيُّ ﷺ يَسْتَأْذِنَّا فِي يَوْمِ إِحْدَانَا بَعْدَمَا نَزَلَتْ {تُرْجِي مَنْ تَشَاءُ مِنْهُنَّ وَتُؤْوِي إِلَيْكَ مَنْ تَشَاءُ} [الأحزاب 51] وَقَالَتْ مُعَاذَةُ فَقُلْتُ مَا كُنْتِ تَقُولِينَ لِلنَّبِيِّ ﷺ إِذَا اسْتَأْذَنَكِ؟ قَالَتْ كُنْتُ أَقُولُ «إِنْ كَانَ ذَلِكَ إِلَيَّ لَمْ أُوثِرْ عَلَى نَفْسِي أَحَدًا»