Hadithcore
Sunan Abi Dawud, 3018

Ibn Shihab said “It has reached me that the Messenger of Allaah(ﷺ) conquered Khaibar by force. Its inhabitants who came down (from their fortress) for expulsion came down after fighting.”

حَدَّثَنَا ابْنُ السَّرْحِ، حَدَّثَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ بْنُ يَزِيدَ، عَنِ ابْنِ شِهَابٍ، قَالَ بَلَغَنِي أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم افْتَتَحَ خَيْبَرَ عَنْوَةً بَعْدَ الْقِتَالِ وَنَزَلَ مَنْ نَزَلَ مِنْ أَهْلِهَا عَلَى الْجَلاَءِ بَعْدَ الْقِتَالِ ‏.‏

References2 variants
In-Book Reference
Book 20, Hadith 91
English Reference
Book 19, Hadith 3012