《后汉书·列传·光武十王列传》
建初年间，又有人告刘延与子男刘鲂造逆谋的，有司奏请用槛车召刘延到廷尉坐牢。
建初中，复有告延与子男鲂造逆谋者，有司奏请槛车征诣廷尉诏狱。
During the Jianchu era, someone again reported that Liu Yan conspired treason with his son Liu Qi. Authorities memorialized to have Liu Yan brought to court in a prison wagon and imprisoned in the Tingwei Court.