From among the persons so summoned, who attend, the court shall select a foreman, who shall be sworn as follows: "You shall diligently inquire and true presentment make of all such matters as may be given you in charge or come to your knowledge touching the present service. You shall present no person through malice, hatred or ill will, nor leave any unpresented through fear, favor, partiality or affection, but in all your presentments you shall present the truth, the whole truth and nothing but the truth. So help you God." The other grand jurors shall afterwards be sworn as follows: "The same oath that your foreman has taken on his part, you and each of you shall observe and keep on your part. So help you God."