There was revealed to the Prophet (peace and blessings be upon him): "O Prophet, say to your wives: If you desire the life of this world and its adornment, then come" [Surah al-Ahzab: 28], to the end of the two verses. The Prophet (peace and blessings be upon him) gave them the choice, and they chose Allah, His Messenger and the Hereafter. So Allah Almighty, in appreciation of this, revealed these verses: "Women are not lawful for you after this, nor that you exchange them for other wives, even if their beauty pleases you, except what your right hand possesses." [Surah al-Ahzab: 52]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13346
Anas bin Malik (may Allah be pleased with him) said: When the Prophet (peace and blessings be upon him) gave his wives the choice and they chose Allah and the Messenger of Allah (peace and blessings be upon him), Allah Almighty restricted him to them and revealed the verse: "Women are not lawful for you after this." [Surah al-Ahzab: 52]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13347
Sayyidah Aishah (may Allah be pleased with her) said: The Prophet (peace and blessings be upon him) did not pass away until (marrying) women was made lawful for him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13348
Ibn Jurayj (may Allah have mercy on him) said concerning the saying of Allah Almighty: "Women are not lawful for you after this, nor that you exchange them for other wives" [Surah al-Ahzab: 52], that Sayyidah Aishah (may Allah be pleased with her) used to say: The Prophet (peace and blessings be upon him) did not pass away until Allah Almighty made it lawful for him to marry; and those (women) were made lawful who had emigrated with him (peace and blessings be upon him), and this is clear in the verses.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13349
Sayyidah Umm Hani (may Allah be pleased with her) said: The Prophet (peace and blessings be upon him) sent me a proposal of marriage. I offered him my excuse and he accepted my excuse. Then Allah Almighty revealed the verse: "O Prophet, indeed We have made lawful for you your wives." [Surah al-Ahzab: 50]
She said: So I was not lawful for him, because I had not emigrated with him; I was one of the Tulaqa' (those set free at the conquest of Makkah).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13350