《旧唐书·本纪·卷十六》
正月二十四日，决定朝议大夫、署理门下侍郎、中书门下省同平章事徐国公萧亻免为尚书右仆射，这是因为他多次上表请求免去政务的缘故。
壬戌，制朝议大夫、守门下侍郎、同中书门下平章事徐国公萧俯为尚书右仆射，累表乞罢政事故也。
On January 24th, it was decided that Xu Guogong Xiao Yi, the Presiding Minister of the Zhishi Academy, the acting Minister of the Department of Personnel, and the Secondary Chief Minister of the Secretariat, would be relieved of his post as the Right Minister of the Department of State, because he had repeatedly submitted memorials requesting to be relieved of his political duties.