《旧唐书·本纪·卷十七》
李德裕进献《丹箴》六首，皇上深为嘉许，命学士韦处厚拟诏慰勉。
李德裕献《丹扆箴》六首，上深嘉之，命学士韦处厚优其答诏。
After Li Deyu presented six pieces of “Elixir Advice”, the emperor was delighted and ordered academician Wei Chuhou to draft an edict expressing his consolation.