《论衡·卷二十五·祀义篇》
假使鼻子堵塞不通，口紧闭不张开，就不能吸入供品的香气了。
使鼻鼽不通，口钳不开，则不能歆矣。
Assuming the nose is blocked and cannot through the air, and the mouth is tightly closed without opening, then the fragrance of the offerings cannot be inhaled.