unnecessary trouble from prying; startling a snake by brushing the grass
A yojijukugo proverb: unnecessary actions or probing can provoke unexpected trouble. Often used as a warning against meddling.
As the saying goes, 'brushing the grass may startle a snake'—unnecessary prying can invite unexpected trouble.
From the Chinese idiom 打草驚蛇, based on an anecdote in 『南唐近事』 in which accusations against an official’s subordinate alarm the similarly corrupt official himself.