Anas bin Malik reported,

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."

Azami 9071

Sahih

عن أنس يقول

سبى النبي ﷺ صفية فأعتقها وتزوجها. فقال ثابت لأنس: ما أصدقها؟ قال: أصدقها نفسها فأعتقها.

الأعظمي 9071صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Biography of the Prophet ﷺ
Chapter
Expedition of Khaybar
Section
Prophet ﷺ choosing Safiya bint Huyayy for himself on the day of Khaybar
Numbering
Jami al-Kamil 9071 (2nd edition)
Azami 9071