《礼记·曲礼上》
在上述场合与人讲话，可以自称 老夫 ，但在朝廷上与自己的国君讲话则要自称己名。邻国来问，国君必问于老者以答之。
自称曰老夫，于其国则称名；越国而问焉，必告之以其制。
In the above situations, when speaking to someone, you can call yourself "old man", but when speaking to your own monarch in the court, you must call yourself by your own name. If a neighboring country comes to inquire, the monarch must ask the old man to answer.