'Swears' in the Bible

Or if anyone swears [an oath] thoughtlessly or impulsively aloud that he will do either evil or good, in whatever manner a person may speak thoughtlessly or impulsively with an oath, but he is unaware of it, when he recognizes it, he will be guilty in one of these.

or has found what was lost and lied about it and sworn falsely, so that he sins in regard to any one of the things a man may do—