Hadithcore
Sunan Abi Dawud, 2995
sahih· Al-Albani

Anas bin Malik said “We came to Khaibar. We bestowed the conquest of fortress (on us), the beauty of Safiyyah daughter of Huyayy was mentioned to him (the Prophet). Her husband was killed (in the battle) and she was a bride. The Messenger of Allaah(ﷺ) chose her for himself. He came out with her till we reached Sadd Al Sahba’ where she was purified. So he cohabited with her.

حَدَّثَنَا سَعِيدُ بْنُ مَنْصُورٍ، حَدَّثَنَا يَعْقُوبُ بْنُ عَبْدِ الرَّحْمَنِ الزُّهْرِيِّ، عَنْ عَمْرِو بْنِ أَبِي عَمْرٍو، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَدِمْنَا خَيْبَرَ فَلَمَّا فَتَحَ اللَّهُ تَعَالَى الْحِصْنَ ذُكِرَ لَهُ جَمَالُ صَفِيَّةَ بِنْتِ حُيَىٍّ وَقَدْ قُتِلَ زَوْجُهَا وَكَانَتْ عَرُوسًا فَاصْطَفَاهَا رَسُولُ اللَّهِ صلى الله عليه وسلم لِنَفْسِهِ فَخَرَجَ بِهَا حَتَّى بَلَغْنَا سُدَّ الصَّهْبَاءِ حَلَّتْ فَبَنَى بِهَا ‏.‏

References2 variants
In-Book Reference
Book 20, Hadith 68
English Reference
Book 19, Hadith 2989