Each panel of the trial jury shall take the following oath:
"You shall well and truly try each case submitted to you during the present term and a true verdict give, according to the law as given you in charge and the opinion you entertain of the evidence produced to you, to the best of your skill and knowledge, without favor or affection to either party, provided you are not discharged from the consideration of the case submitted. So help you God."
OCGA § 15-12-138