asseveration

"There can't nobody live in peace in them two blocks, Judge, your Honour," came the heated asseveration of the man in the witness chair.

From The Tempering by Charles Neville Buck

Now did not you deny in the Tower unto me with earnest asseveration, that you had not any conference with Hall, until the witness was produced against you, and then you confessed it?

From The Condition of Catholics Under James I. by John Gerard

But although the theologian heaps up protestation upon asseveration until the mass attains an imposing size, the whole is not of more substantial value than a huge bubble blown by an energetic school boy.

From Ancient Faiths And Modern A Dissertation upon Worships, Legends and Divinities by Thomas Inman

She seemed to expect his asseveration, Cethegus was silent for a short time.

From A Struggle for Rome, v. 1 by Felix Dahn

Enough surely has been already adduced to warrant a reasonable man in refusing to accept Professor Jowett's repeated asseveration that the Bible is "to be interpreted like any other book."

From Inspiration and Interpretation Seven Sermons Preached Before the University of Oxford by John William Burgon