《论衡·卷二十四·难岁篇》
青龙神的形体不过几千丈，假如太岁神的形体应当又长又大，增加到几万丈，让太岁的身体遮盖住整个北方，应当说太岁在北方，不应当说太岁只在 子 这一个位置上。
龙之体不过数千丈，如令神者宜长大，饶之数万丈，令体掩北方，当言太岁在北方，不当言在子。
The body of God of Azure Dragon is only a few thousand zhang. If the body of God of Tai Sui should be even larger, extending to tens of thousands of zhang, and the body of Tai Sui covers the entire north, it should be said that Tai Sui is in the north, and it should not be said that Tai Sui is only in the Zi position.