Sahih al-Bukhari 4789
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah the Most High: "You (O Muḥammad ﷺ) can postpone (the turn of) whom you will of them (your wives), and you may receive whom you will. And whomsoever you desire of those whom you have set aside (her turn temporarily), it is no sin on you (to receive her again)..." (V.33:51)
Narrated Mu`adha: `Aisha said, "Allah's Messenger (ﷺ) used to take the permission of that wife with whom he was supposed to stay overnight if he wanted to go to one other than her, after this Verse was revealed:-- "You (O Muhammad) can postpone (the turn of) whom you will of them (your wives) and you may receive any (of them) whom you will; and there is no blame on you if you invite one whose turn you have set aside (temporarily). (33:51) I asked Aisha, "What did you use to say (in this case)?" She said, "I used to say to him, "If I could deny you the permission (to go to your other wives) I would not allow your favor to be bestowed on any other person."