Hasan bin Muhammad (may Allah have mercy on him) narrates that Abu al-As bin al-Rabi' bin Abd al-Uzza bin Abd Shams bin Abd Manaf, who had married the daughter of the Prophet (peace and blessings be upon him), was brought to the Prophet (peace and blessings be upon him) in connection with the ransom, and Sayyidah Zaynab (may Allah be pleased with her) came to him. Amr (bin Dinar) said: My view is that the two of them were kept upon their marriage from the time of the Jahiliyyah.
Hadith Referenceالمعجم الكبير للطبراني / باب اللام / 16502