《元史·列传·卷六》
至正八年，赠中奉大夫、辽阳等处行中书省参知政事、护军，追封鲁郡公。硕德，乃燕之子，聪敏能干。世祖即位，硕德为宫中警卫，负责朝廷礼仪事宜，后任同知通政院事。
硕德，通敏有干才。世祖即位，入宿卫，典朝仪，后同知通政院事。
In the eighth year of Zhizheng, he was posthumously awarded the titles of Deputy of the Central Bureau, Governor of Liaoyang, and the Protector of the Army; he was also posthumously granted the title of Duke of Lugun. Shuo De was Yan's son and was smart and capable. After the emperor took the throne, Shuo De became a guard of the palace and was responsible for the etiquette ceremonies of the court. He later became the deputy of the Bureau of Transmission.