expression
the word of an emperor cannot be unsaid
Proverb meaning that once an emperor speaks, it cannot be taken back, just as sweat cannot return into the body. Used to emphasize the irrevocability of a ruler's words.
「綸言汗の如し」という言葉は、君主の一言の重みを表している。
The phrase 'the word of an emperor cannot be unsaid' expresses the weight of a monarch's single utterance.
From classical Chinese literature; the exact origin is uncertain, but the phrase is traditionally associated with the irrevocability of imperial decrees.