a lie has no legs

Proverb

You can't get away with a lie; the truth will always come out.

Japanese Meaning

嘘は結局ばれる。嘘は持続しないから、いつの日か真実が明らかになるという意味。 / 嘘は一時的なものに過ぎず、真実は永遠に隠し通せないという警句。

He tried to cover up the mistake, but a lie has no legs, and the truth came out during the audit.

彼はミスを隠そうとしたが、嘘は長続きせず、監査の間に真実が明らかになった。

Sense（1）

You can't get away with a lie; the truth will always come out.