Mukhtasar Muslim

Narrated from Umm al-Mu'mineen Umm Salamah (may Allah be pleased with her) that when the Messenger of Allah (peace and blessings be upon him) married her, he stayed with her for three days and then said: "You are not insignificant to your husband. If you wish, I will stay with you for a week, and if I stay with you for a week, then I will stay with each of my other wives for a week (and then after all of them, your turn will come again)."