An "oath" is declared to be the calling upon God to witness that what is said by the person sworn is true. It includes an affirmation and embraces every method whereby the conscience of a witness is obligated to testify to the truth. The contents of an oath may vary according to the conditions existing at the time the person is sworn. Generally speaking no particular form of words is necessary. In many instances, however, the Ohio code provides what the oath shall contain. These provisions are mandatory and the language of the statute must be strictly adhered to.
William F. Burns, Oath of Office, 5 Clev.-Marshall L. Rev. 145 (1956)