《三国志·魏书·韩崔高孙王传》
三公在每月初一、十五朝见的时间，也可以特地请入朝中，议论国家政事的得失，广泛地讲清事实，应该会对陛下治理有益，弘扬国家的教化。 
三公朝朔望之日，又可特延入，讲论得失，博尽事情，庶有裨起天听，弘益大化。 
The three dukes can also be specially invited to the court at the time of the court meeting on the first and fifteenth of each month to discuss the gains and losses of state affairs, and to explain the facts in detail, which should be beneficial to the management of His Majesty and carry forward the national education.