《辽史·本纪·卷十二》
十四日，谏议大夫马得臣因为皇上嗜好击球，上书疾言劝谏说 ：臣见皇上在处理政务之余，以击球为乐事。
甲子，谏议大夫马得臣以上好击球，上疏切谏： 臣伏见陛下听朝之暇，以击球为乐。
on the fourteenth day, the Yushi Dafu Ma Dechen, because the emperor was addicted to playing polo, wrote a letter to persuade him by saying: "I see that Your Majesty enjoys playing polo after handling the state affairs.