Hisham bin Urwah (may Allah have mercy on him) narrates from his father that Sayyidah Aishah (may Allah be pleased with her) said to him: O my nephew! The Messenger of Allah (peace and blessings be upon him) did not favour any of us over another in assigning turns, and every day he (peace and blessings be upon him) would visit each wife without intercourse, until he spent the night with the one whose turn it was.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب القسم والنشوز / 14754