Leviticus 5:4

That unrighteous soul, which determines with his lips to do evil or to do good according to whatsoever a man may determine with an oath, and it shall have escaped his notice, and he shall [afterwards] know [it], and [so] he should sin in some one of these things:—

Or if a soul swear, pronouncing with his lips to do evil, or to do good, whatsoever it be that a man shall pronounce with an oath, and it be hid from him; when he knoweth of it, then he shall be guilty in one of these.

“‘Or if anyone swears rashly with his lips to do evil or to do good—whatever it is that a man might utter rashly with an oath, and it is hidden from him—when he knows of it, then he will be guilty of one of these.