《周书·列传·卷三十二》
柳敏操行公正平直，性格又很恭顺勤谨，每日将要上朝，必然早起等待天亮。
敏操履方正，性又恭勤，每日将朝，必夙兴待旦。
Liu Min's conduct was honest and impartial, and his personality was respectful and diligent, and he would always wake up early and wait for daylight before going to court everyday.