Rashi on Leviticus 10:9/רש"י על ויקרא י׳:ט׳

1ושכר ‎יין [DO NOT DRINK] WINE NOR STRONG DRINK — do not drink wine in a manner that brings out its intoxicating force (i. e. do not drink a “log” of wine) (Sifra, Shemini, Section 1 1; Keritot 13b).

2‎‏ בבאכם אל אהל מועד WHEN YE GO INTO THE APPOINTED TENT — I have in these words only a law that forbids this when ye go into the Sanctuary; whence can it be derived that it applies also whenever they approached the outer altar? But there is mention here of entering into the appointed tent and there is mention, in connection with the sanctification (the washing) of the hands and feet, of entering into the appointed tent (Exodus 30:20). What is the law there? It (the Torah) made the law regarding approaching to the altar exactly similar to that regarding entering the appointed tent (“when they go into the appointed tent they shall wash with water … or when they come near to the altar”)! Here, also, it makes approaching the altar exactly similar to entering the appointed tent (Sifra, Shemini, Section 1 5).