白圭之中山, 中山王欲留之,固辭而去;又之齊,齊王亦欲留之,又辭而去。
When Bo Gui39 went to Zhongshan, the king of Zhongshan wanted to keep him there, but he resolutely declined the offer and left.
Then, when he went to Qi, the king of Qi also wanted to retain him, but he again declined the offer and left.