And they shall be upon Aaron, and upon his sons, when they come in unto the tabernacle of the congregation, or when they come near unto the altar to minister in the holy place; that they bear not iniquity, and die: it shall be a statute for ever unto him and his seed after him.
And Aaron and his sons must wear them when they enter the meeting tent or approach the altar to serve in the holy area. This way, they don't commit wrongdoing and die. This rule lasts forever for them and their descendants.