Okla. Stat. tit. 21 § 390
Every officer to whose charge any juror or jury is committed by any court or magistrate, who negligently or willfully permits them, or any one of them, either:
Every bailiff, or other officer or person, into whose custody and care any court of record contemplates committing any juror or jury, before entering upon his duties as such for the court term or such lesser period of such service as the court may determine, shall first be admonished and shall make in writing and file with the clerk of such court a solemn oath, sworn to before the clerk or judge of such court, to the effect that he will regard the foregoing provisions of this section and that he will faithfully prevent the same and obstruct any attempt to accomplish or to attempt to do any of them, but at the same time to have regard to the comfort and well-being of the jurors and all of them, entrusted into his care in each and every jury trial in any cause during such court term or lesser period of appointment by such court.
In every court the same admonition shall be given and the same oath required as above, in each jury trial; but the court shall have the option whether the same be oral, or in writing and filed in such case, but thereafter during the trial of the same cause and until such jury is dismissed from further consideration of the same it shall not be necessary, for all intent and purposes of this act, to administer again such admonition or to require such oath.
Okla. Stat. tit. 21, § 390