《资治通鉴·唐纪·唐纪二十八》
左散骑常侍褚无量认为履冰的建议正确；但对这一问题的争议，持续了一年多也没有定论。
左散骑常侍褚无量以履冰议为是；诸人争论，连年不决。
Left Scattered Riding Attendant Chu Wuliang believed that Lubing's suggestion was correct; but the controversy over this issue continued for more than a year without a conclusion.