Umm Salama (Allah be pleased with her) reported that Messenger of Allah 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.

حَدَّثَنِي أَبُو كُرَيْبٍ، مُحَمَّدُ بْنُ الْعَلاَءِ حَدَّثَنَا حَفْصٌ، - يَعْنِي ابْنَ غِيَاثٍ - عَنْ عَبْدِ، الْوَاحِدِ بْنِ أَيْمَنَ عَنْ أَبِي بَكْرِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ بْنِ هِشَامٍ، عَنْ أُمِّ سَلَمَةَ، ذَكَرَ أَنَّﷺ تَزَوَّجَهَا وَذَكَرَ أَشْيَاءَ هَذَا فِيهِ قَالَ " إِنْ شِئْتِ أَنْ أُسَبِّعَ لَكِ وَأُسَبِّعَ لِنِسَائِي وَإِنْ سَبَّعْتُ لَكِ سَبَّعْتُ لِنِسَائِي " .