In witness whereof

IN WITNESS WHEREOF. These words, which, when conveyancing was in the Latin language, were in cujus rei testimonium, are the initial words of the concluding clause in deeds. "In witness whereof the said parties have hereunto set their hands," &c.

References in classic literature ?
In Witness whereof we have hereunto subscribed our names at Cape Cod the eleventh of November, in the Raigne of our Sovereigne Lord, King James of England, France, and Ireland, the eighteenth, and of Scotland, the fiftie-fourth, Anno.
Done in Convention by the Unanimous Consent of the States present the Seventeenth Day of September in the Year of our Lord one thousand seven hundred and eighty seven and of the Independence of the United States of America the Twelfth In Witness whereof We have hereunto subscribed our Names,
IN WITNESS WHEREOF, I have hereunto set my hand and seal as Clerk of the Court on this 11th day of September, 2017.
IN WITNESS WHEREOF, I have hereunto set my hand this 14th day of September 2017, the two-hundred forty-second year of the Independence of the United States of America.
IN WITNESS WHEREOF, I have hereunto set my hand this 1st day of August 2011, the two-hundred thirty-sixth year of the Independence of the United States of America.
In Witness Whereof, I have hereunto set my hand this first day of April, in the year of our Lord two thousand eight, and of the Independence of the United States of America the two hundred and thirty-second."
IN WITNESS WHEREOF, I have hereunto set my hand this fourteenth day of January, in the year of our Lord two thousand five, and of the Independence of the United States of America the two hundred and twenty-ninth.
In Witness Whereof, we have hereunto set our hands, this twenty seventh day of February in the year eighteen hundred and eighty-eight, Alpheus Hyatt, Samuel Mills, William T.
In witness whereof I have hereunto subscribed my former and adopted names of (full old name) and (full new name) and affixed my seal this (date) day of (month, year).
So will avoiding words and phrases such as "hereinabove" and "in witness whereof." Stating terms in a positive manner also helps.