Read the handwriting on the wall

Meaning

See the signs that something is going to happen.

Usage

Warns of impending trouble.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Biblical reference to Daniel interpreting a mysterious message.

Has been a cautionary metaphor for millennia.