Leviticus 5:2-4

Revised Standard Version

² Or if any one touches an unclean thing, whether the carcass of an unclean beast or a carcass of unclean cattle or a carcass of unclean swarming things, and it is hidden from him, and he has become unclean, he shall be guilty. ³ Or if he touches human uncleanness, of whatever sort the uncleanness may be with which one becomes unclean, and it is hidden from him, when he comes to know it he shall be guilty. ⁴ Or if any one utters with his lips a rash oath to do evil or to do good, any sort of rash oath that men swear, and it is hidden from him, when he comes to know it he shall in any of these be guilty.