Leviticus 10:8

5 So they came and took them, in their coats, outside the tent-circle, as Moses had said.

6 And Moses said to Aaron and to Eleazar and Ithamar, his sons, Do not let your hair be loose, and give no signs of grief; so that death may not overtake you, and his wrath come on all the people; but let there be weeping among your brothers and all the house of Israel for this burning of the Lord's fire.

7 And do not go out from the door of the Tent of meeting, or death will come to you; for the holy oil of the Lord is on you. And they did as Moses said.

8 And the Lord said to Aaron:

9 Take no wine, or strong drink, you or your sons with you, when you go into the Tent of meeting, that it may not be the cause of death to you; this is an order for ever through all your generations.

10 And make a division between the holy and the common, and between the unclean and the clean;

11 Teaching the children of Israel all the laws which the Lord has given them by the hand of Moses.