Zainab was married to his adoptive son Zaid (buk
7420), But Allah made her licite (
33:37), After Allah revealed a verse to allow him to have her, he did (nas
3251), He was so eager to have her that even Allah revealed a verse to make those who lingered after the wedding to go away (
33:53), see the asbab al nuzul (buk
4791)