《后汉书·列传·窦融列传》
窦融到，至洛阳城门，呈上凉州牧、张掖郡国都尉、安丰侯印绶，帝令使者退还侯的印绶。
融到，诣洛阳城门，上凉州牧、张掖属国都尉、安丰侯印绶，诏遣使者还侯印绶。
When Dou Rong arrived at the gates of Luoyang, he presented his seals as prefect of Liangzhou and commander of Zhangye commandery and as marquis of Anfeng. The emperor ordered the envoy to return his seal as marquis.