oratorically

"You are a low-minded, mercenary creature," said O'Shea, oratorically.

"I tell you it is so," he said oratorically and dogmatically to the others.

He had, he says, “fought with beasts (oratorically) in divers arenas.”

Men aim to speak earnestly and convincingly, but not oratorically.

At last he cleared his throat, oratorically, and then she promptly interrupted him.

I take the liberty of making the remark, as one who has fought with beasts (oratorically) in divers arenas.