English Standard Version
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, and realizes his guilt;New International Version
"'Or if he touches human uncleanness-anything that would make him unclean-even though he is unaware of it, when he learns of it he will be guilty.Catholic Public Domain Version
And if he will have touched anything from the uncleanness of man, according to every kind of impurity by which he may be defiled, and having forgotten it, afterwards realizes it, he shall be guilty of committing a transgression