《旧唐书·列传·卷一百二十》
元和六年，他以司封员外郎职务掌管拟制诏令，不久转任本司郎中。
元和六年，以司封员外郎知制诰，寻转本司郎中。
In the sixth year of the Yuanhe era (811), Pei Du was put in charge of drafting imperial edicts as a junior official in the Ministry of Rites. He was soon promoted to the position of full-fledged official in the same ministry.