《资治通鉴·唐纪·唐纪九》
癸酉，任命前任太子少保李纲为太子少师，兼任御史大夫的萧为太子少傅。
癸酉，以前太子少保李纲为太子少师，以兼御史大夫萧瑀为太子少傅。
On Guiyou Day, former junior prince instructor Li Gang was appointed as junior prince tutor, while Xiao, the concurrently serving master of imperial historians, was appointed as assistant junior prince tutor.