過ぎたるは及ばざるがごとし

過ぎたるは及ばざるがごとし、過ぎたるは及ばざるが如しすぎたるはおよばざるがごとし sugitaruhaoyobazarugagotoshi

JMdict entry #2395080

expressions (phrases, clauses, etc.) proverb the last drop makes the cup run over; too much of a good thing; less is more