The Prophet ﷺ took Safiyyah captive, then freed her and married her.Thabit asked Anas, "What did he give her as her dowry?"Anas replied, "Her dowry was herself. He freed her and that was her dowry."
سبى النبي ﷺ صفية فأعتقها وتزوجها. فقال ثابت لأنس: ما أصدقها؟ قال: أصدقها نفسها فأعتقها.