Sahih al-Bukhari Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) Abu 'Imran al-Ansari al-Shami أبو عمران الأنصاري الشامي 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.” https://parallelquran.com/hadith/sahih-al-bukhari-4032/