《北齐书·本纪·卷八》
深夜用火照明，强迫劳作，严寒时用热水合泥，致使百工困穷，无法休息。
夜则以火照作，寒则以汤为泥，百工困穷，无时休息。
He lit bonfires late at night and forced people to work; when it was freezing, he made them mix mud with hot water, so that the workers became exhausted and unable to rest.