Goes without saying
Meaning
So obvious that it needs no mention.
Usage
Preface statements that seem self-evident.
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.
Reassurance that no explanation is necessary.
Used since the 1800s in spoken English.