《旧唐书·本纪·卷一》
于是太宗与文德皇后交相进献给太上皇饭食，并献上太上皇使用的衣服器用，完全同一家人的家常礼节。
于是太宗与文德皇后互进御膳，并上服御衣物，一同家人常礼。
Emperor Taizong and Empress Wende then took turns serving Emperor Gaozu food and presenting him with the clothes and utensils that he used, just like the everyday courtesies shown within a family.