Anas bin Malik reported,

We arrived at Khaybar, and when Allah granted the conquest of the fortress, the beauty of Safiya bint Huyayy was mentioned to him. Her husband had been killed, and she was a bride. The Messenger of Allah ﷺ chose her for himself. He set out with her, and when we reached Sadd as-Sahba, she became permissible for him, and he consummated the marriage with her there.

Abu Dawud 2995

Sahih

حدثنا سعيد بن منصور حدثنا يعقوب بن عبد الرحمن الزهري عن عمرو بن أبي عمرو

عن أنس بن مالك قال

قدمنا خيبر فلما فتح الله تعالى الحصن ذكر له جمال صفية بنت حيي وقد قتل زوجها وكانت عروسا فاصطفاها رسول الله ﷺ لنفسه فخرج بها حتى بلغنا سد الصهباء حلت فبنى بها

أبو داود 2995صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Abu Dawud
Book
Land tax, leadership, and spoils of war
Chapter
Share of the chosen spoils
Numbering
Darussalam 2995
Abu Dawud 2995