History of the Jews in Khaybar
The Jewish community in Khaybar, which is north of Medina (formerly Yathrib), flourished in the 7th century. == Migration to Khaybar == according to Jewish tradition The first migration of Jews to Khaybar dates back, by some accounts, to the time of King David, others date it back to the time of Babylonian exile.
Source: Wikipedia — History of the Jews in Khaybar (CC BY-SA 4.0)