on authority

Why on their own authority have they come to your country?

Still, we have no right in law to take life on our own authority.

The student teacher relationship many times is based on authority.

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

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

The city police have the better claim on full authority.

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

Went to the judge to speak up for Frank on your authority?

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

"You have all this on the very best authority, of course?"