《资治通鉴·唐纪·唐纪五十九》
担任考官的左散骑常侍冯宿等人看到刘的对策后，都赞叹不绝，十分佩服他的才能和胆识，但由于惧怕宦官，而不敢录取。
考官左散骑常侍冯宿等见刘蕡策，皆叹服，而畏宦官，不敢取。
Left Cavalier Constant Attendant Feng Su and others who served as examiners praised Liu's strategy responses and were very impressed by his talent and courage, but out of fear of the eunuchs, they did not dare to admit him.