From Sahih Muslim (Hadith 3625):
Umm Salama (Allah be pleased with her) reported that Allah's Messenger (ﷺ) married her, and he (the narrator) made mention of so many things in this connection (and one of them was this) that he said:If you desire that I spend a week with you, I shall have to spend a week with my (other) wives, and if spend a week with you, I shall have to spend a week with my (other) wives
Reference: Muslim 3625