Sayyidah Aishah (may Allah be pleased with her) said: O my nephew! The Prophet (peace and blessings be upon him) did not favour any of us over another in the division of his staying with us, and there was hardly a day on which he (peace and blessings be upon him) did not go round to all of us wives, coming near to each woman without touching, until he reached the one whose turn it was, and he (peace and blessings be upon him) would spend the night with her. And when Sawdah (may Allah be pleased with her) grew old and feared that he (peace and blessings be upon him) would separate from her, she said: Give my turn to Aishah (may Allah be pleased with her); and he (peace and blessings be upon him) accepted this from her. (The narrator) said: She used to say that concerning this and similar cases Allah Almighty revealed, I think he said: "And if a woman fears from her husband ill-conduct or desertion, there is no sin upon them both" [Surah al-Nisa: 128].
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13434