Anas bin Malik reported,

The Prophet ﷺ stayed for three nights between Khaybar and Medina, where his marriage to Safiyyah was consummated. I invited the Muslims to his wedding feast, and there was no bread or meat in it. All that happened was that he ordered Bilal to spread out the leather mats, which were laid out, and then he placed dates, dried curd, and clarified butter upon them.The Muslims said, "Is she one of the Mothers of the Believers, or one of those his right hand possesses?"They said, "If he veils her, then she is one of the Mothers of the Believers, but if he does not veil her, then she is among those his right hand possesses."When he set out, he prepared a place for her behind him and drew the veil.

Bukhari 4213

Sahih

حدثنا سعيد بن أبي مريم أخبرنا محمد بن جعفر بن أبي كثير قال أخبرني حميد أنه سمع

أنسا رضي الله عنه يقول

أقام النبي ﷺ بين خيبر والمدينة ثلاث ليال يبنى عليه بصفية فدعوت المسلمين إلى وليمته وما كان فيها من خبز ولا لحم وما كان فيها إلا أن أمر بلالا بالأنطاع فبسطت فألقى عليها التمر والأقط والسمن فقال المسلمون إحدى أمهات المؤمنين أو ما ملكت يمينه قالوا إن حجبها فهي إحدى أمهات المؤمنين وإن لم يحجبها فهي مما ملكت يمينه فلما ارتحل وطأ لها خلفه ومد الحجاب

البخاري 4213صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Expeditions
Chapter
Expedition of Khaybar
Numbering
Darussalam 4213
Bukhari 4213