身から出た錆

みからでたさび

paying for one's mistakes; getting one's just deserts; suffering the consequences (of one's own actions); reaping what you sow

Also written 身から出たサビ、身からでたサビ

Meaning

exp
paying for one's mistakes; getting one's just deserts; suffering the consequences (of one's own actions); reaping what you sow; making a rod for one's own back

Example sentences

文句を言うなよ。身から出た錆だぞ。

Don't complain about that. You've asked for it.
君の身から出た錆だ。

You have no one but yourself to blame.