Leviticus 5:3

5:3 "'Or if he touches the uncleanness of man, whatever his uncleanness is with which he is unclean, and it is hidden from him; when he knows of it, then he shall be guilty.
-World English Bible

Other Translation

5:3 Or if he touch the uncleanness of man, whatsoever uncleanness [it be] that a man shall be defiled withal, and it be hid from him; when he knoweth [of it], then he shall be guilty.
-King James Version