This may be understood, either,
1. Of the person touching, if he that hath an issue toucheth another with unwashen hands. Thus most take it. But why then should it be limited to his hands? for if he had touched him by any other part, as suppose by kissing him, he had defiled him, though his hands had been washed. Or rather,
2. Of the person touched, to whom the washing of his hands is prescribed as an easier way of cleansing himself, if speedily used; but if that was neglected or delayed, a more laborious course was enjoined him. And thus the Syriac interpreter understands it.