《新唐书·列传·卷四十三》
不久，李渤担任理匦使，建议 ：大事上奏皇上，其次告知宰相，再次交给有司。
俄充理匦使，建言： 事大者以闻，次白宰相，下以移有司。
Not long afterwards, Li Bo was appointed Attendant for Confidential Submissions, and he proposed: Major matters should be memorialized to the emperor, matters of secondary importance should be referred to the prime minister, and anything else should be handed over to the relevant office.