'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.

or anything about which he has sworn falsely; he shall not only restore it in full, but shall add to it one-fifth more. He shall give it to the one to whom it belongs on the day of his guilt offering.