《太平广记·卷一百九十一·骁勇一》
君毚上奏皇上，说回纥等部落难以管制，暗地策划叛乱，便留下四部落都督。
君毚奏回纥等部落难制，潜有谋叛，遂留四部都督。
Jun Ji submitted a memorial to the emperor, saying that it was difficult to control the Huihe tribe and that they were planning a rebellion in secret and so he left the four-tribe Dudu in place.