Rashi on Leviticus 8:3/רש"י על ויקרא ח׳:ג׳

1הקהל אל פתח אהל מועד AND ASSEMBLE THOU [THE WHOLE CONGREGATION), UNTO THE ENTRANCE OF THE TENT OF MEETING — This is one of the instances where the lesser comprised the greater (the small area accommodated the whole congregation) (Leviticus Rabbah 10 9).