Moses said to Aaron and his sons Eleazar and Ithamar, “Do not dishevel your hair or tear your garments, lest you die and bring God’s wrath also on the whole community. While your kindred, the rest of the house of Israel, may mourn for those whom the Lord’s fire has burned up, you shall not go beyond the entrance of the tent of meeting, else you shall die; for the anointing oil of the Lord is upon you.” So they did as Moses told them.

The Lord said to Aaron: When you are to go to the tent of meeting, you and your sons are forbidden, by a perpetual statute throughout your generations, to drink any wine or strong drink, lest you die.

You must be able to distinguish between what is sacred and what is profane, and between what is clean and what is unclean; and you must be able to teach the Israelites all the statutes that the Lord has given them through Moses.