Ohio Revised Code Title XXIX. Crimes Procedure § 2939.06

(A) When a grand jury is impaneled, the court of common pleas shall appoint one of the members of the grand jury as foreperson, and shall administer, or cause to be administered, to the jurors an oath in the following words to which the jurors shall respond “I do solemnly swear” or “I do solemnly affirm”:

“Do you solemnly swear or affirm that you will diligently inquire into and carefully deliberate all matters that shall come to your attention concerning this service; and do you solemnly swear or affirm that you will keep secret all proceedings of the grand jury unless you are required in a court of justice to make disclosure; and do you solemnly swear or affirm that you will indict no person through malice, hatred, or ill will; and do you solemnly swear or affirm that you will not leave unindicted any person through fear, favor, or affection, or for any reward or hope thereof; and do you solemnly swear or affirm that in all your deliberations you will present the truth, the whole truth, and nothing but the truth, according to the best of your skill and understanding, as you shall answer unto God or under the penalties of perjury?”

(B) If, on or after the effective date of this amendment, a court impaneling a grand jury uses the grand juror's oath that was in effect prior to the effective date of this amendment instead of the oath set forth in division (A) of this section, the court's use of the former oath does not invalidate or affect the validity of the impanelment of the grand jury, any proceeding, inquiry, or presentation of the grand jury, any indictment or other document found, returned, or issued by the grand jury, or any other action taken by the grand jury.