《旧唐书·列传·卷一百二十二》
顺从这种坚决辞让的愿望，以期推重良好教化的风气，可按银青光禄大夫、兼尚书左仆射的职位辞官归居。 
遂兹牢让，以厚时风，可银青光禄大夫、守尚书左仆射致仕。 
Following his resolutely humble request, so as to promote the atmosphere of good teaching, he was allowed to resign from his official positions (Minister of State and Left Assistant of the Imperial Secretariat) and return home.