Sayyidah Aishah (may Allah be pleased with her) said: I used to feel jealous of the women who offered themselves to the Prophet (peace and blessings be upon him), and I would say: "Can a woman gift herself?" Then Allah Almighty revealed the verse: "You may defer whom you will of them and take to yourself whom you will" [Surah al-Ahzab: 51]. So I said: "By Allah, I see that your (peace and blessings be upon him) Lord fulfils your wishes without delay."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13354