'Sworn' in the Bible

‘If anyone sins after he hears a public adjuration (solemn command to testify) when he is a witness, whether he has seen or [otherwise] known [something]—if he fails to report it, then he will bear his guilt and be held responsible.

When a person has sworn inadvertently by what he has said, whether for evil or good, whatever it was that the person spoke, when he comes to understand what he said, he will incur guilt by one of these things.

or hath found a lost thing, and hath lied concerning it, and hath sworn to a falsehood, concerning one of all these which man doth, sinning in them:

Or all that about which he hath sworn falsely; he shall even restore it in the principal, and shall add the fifth part more thereto, and give it unto him to whom it appertaineth, in the day of his trespass offering.