《宋书·本纪·卷二》
天子重申先前的加封令，刘裕又一次坚辞，于是改封他为太尉、中书监，刘裕这才接受。
天子又申前命，公固辞。于是改授太尉、中书监，乃受命。
The emperor reiterated the previous promotion order. Liu Yu once again firmly declined. Thus, the emperor changed the promotion to Grand Commandant and Supervisor of the Imperial Secretariat. Only then did Liu Yu accept.