Matthew Henry Commentary Leviticus 10:8-11

"And Jehovah spake unto Aaron, saying, Drink no wine nor strong drink, thou, nor thy sons with thee, when ye go into the tent of meeting, that ye die not: it shall be a statute for ever throughout your generations: and that ye may make a distinction between the holy and the common, and between the unclean and the clean; and that ye may teach the children of Israel all the statutes which Jehovah hath spoken unto them by Moses." — Leviticus 10:8-11 (ASV)

Do not drink wine or strong drink. During the time they ministered, the priests were forbidden it. It is required of gospel ministers that they not be given to wine (1 Timothy 3:3). It is, Lest ye die; die when you are drunk. The danger of death, to which we are continually exposed, should prompt all to be sober.