I swear to tell the truth, the whole truth, and nothing but the truth.

我发誓说出真相，整个真相，完完全全的真相。

youdao

Do you promise to tell the truth, the whole truth and nothing but the truth?

你有承诺要说出真相吗？全部的真相而且只说实话。

youdao

I swear to tell the truth, the whole truth, and nothing but the truth, so help me god.

我发誓，我所说的是真实，尽其所实，即所述之言纯属实言并且无任何隐瞒。

youdao

I'm not a lawyer, but I don't think that the law requiring you to tell the truth, the whole truth and nothing but the truth means you can tell the truth that's convenient or the truth only about certain things.

CNN: Transcript: House debates articles of impeachment

Here the judge's violation of the oath 'to tell the truth, the whole truth, and nothing but the truth' was deemed an impeachable offense.

CNN: Sen. Allard's closed-door impeachment statement

The hearing began with the judge's clerk formally calling on witnesses to tell the truth, the whole truth and nothing but the truth.

BBC: NEWS | Entertainment | Latin music case reopens in Cuba