good authority

I have it on good authority he's done nothing to you.

I have it on good authority that other fathers play this game.

I have it on good authority that I'm likely to live.

But they wouldn't bury a man under that name without good authority.

It's perfectly normal and I been told so on good authority.

And I had it on good authority that he might be at the dinner tonight.

"I got it on good authority," he said and turned back to his work.

"I got it on good authority he's set to pop with something."

You have it on good authority from me that they will not realize anything.

And I have it on good authority that you'd be the one to tell me.