Leviticus 5:3-4

MKJV(i) 3 or if he touches the uncleanness of man, whatever uncleanness by which he is unclean, and it is hidden from him, and he knows, then he shall be guilty. 4 Or if a soul swears, pronouncing with his lips to do evil or to do good, whatever it is that a man speaks rashly with an oath, and it is hidden from him, and he knows, then he shall be guilty of one of these.