Anas (Allah be pleased with him) reported

I was sitting behind Abu Talha on the Day of Khaibar and my feet touched the foot of Allah's Messenger (ﷺ), and we came (to the people of Khaibar) when the sun had risen and they had driven out their cattle, and had themselves come out with their axes, large baskets and hatchets, and they said: (Here come) Muhammad and the army. Allah's Messenger (ﷺ) said: Khaibar is ruined. Verily when we get down in the valley of a people, evil is the morning of the warned ones (al-Qur'an, xxxvii. 177). Allah, the Majestic and the Glorious, defeated them (the inhabitants of Khaibar), and there fell to the lot of Dihya a beautiful girl, and Allah's Messenger (ﷺ) got her in exchange of seven heads, and then entrusted her to Umm Sulaim so that she might embellish her and prepare her (for marriage) with him. He (the narrator) said: He had been under the impression that he had said that so that she might spend her period of 'Iddah in her (Umm Sulaim's) house. (The woman) was Safiyya daughter of Huyayy. Allah's Messenger (ﷺ) arranged the wedding feast consisting of dates, cheese, and refined butter, and pits were dug and tiers were set in them dining cloths, and there was brought cheese and refined butter, and these were placed there. And the people ate to their fill, and they said: We do not know whether he (the Holy Prophet ) had married her (as a free woman), or as a slave woman. They said: If he (the Holy Prophet) would make her wear the veil, then she would be a (free married) woman, and if he would not make her wear the veil, then she should be a slave woman. When he intended to ride, he made her wear the veil and she sat on the hind part of the camel; so they came to know that he had married her. As they approached Medina, Allah's Messenger (ﷺ) drove (his ride) quickly and so we did. 'Adba' (the name of Allah's Messenger's camel) stumbled and Allah's Messenger (ﷺ) fell down and she (Radrat Safiyya: also fell down. He (the Holy Prophet) stood up and covered her. Women looked towards her and said: May Allah keep away the Jewess! He (the narrator) said: I said: Aba Hamza, did Allah's Messenger (ﷺ) really fall down? He said: Yes, by Allah, he in fact fell down.