《史记·七十列传·万石张叔列传》
皇帝有时赏赐食物送到他家，必定叩头跪拜之后才弯腰低头去吃，如在皇帝面前一样。
上时赐食於家，必稽首俯伏而食之，如在上前。
The emperor would sometimes give him food rewards, when he would bow and kneel before eating, just like he would in front of the emperor.