《吕氏春秋·览·恃君览》
郈成子为鲁国聘问晋国，路过卫国，卫国的右宰谷臣留下并宴请他，右宰谷臣陈列上乐器奏乐，乐曲却不欢快，喝酒喝到畅快之际，把璧玉送给了郈成手。
郈成子为鲁聘于晋，过卫，右宰谷臣止而觞之。陈乐而不乐，酒酣而送之以璧。
Guan Chengzi was passing through the state of Wei as an envoy of the state of Lu on the way to the state of Jin. You Zaigu, the minister of the right of the state of Wei, kept him back and played music for him. The music was not cheerful. When they had drunk to their heart's content, You Zaigu sent Guan Chengyu a jade pi as a present.