'Oath' in the Bible

And when a person doth sin, and hath heard the voice of an oath, and he is witness, or hath seen, or hath known -- if he declare not, then he hath borne his iniquity:

Or when a person sweareth, speaking wrongfully with the lips to do evil, or to do good, even anything which man speaketh wrongfully with an oath, and it hath been hid from him; -- when he hath known then he hath been guilty of one of these;