Hadith #4032 (Sahih al-Bukhari)
Book: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Narrator(s): Abu 'Imran al-Ansari al-Shami أبو عمران الأنصاري الشامي
Grade: Sahih

Anas looked at the people wearing Tailsans (i.e. a special kind of head covering worn by Jews in old days). On that Anas said, “At this moment they (i.e. those people) look like the Jews of Khaibar.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-4032/