Kabbalah sobre Números 1:55

If regarding her jewels this was so, it is much more so that whoever touched her body, even her finger, for the purpose of mating, then, "and the stranger that comes near shall be put to death" (Numbers 1:51), since the Holy One, blessed be He, did not give him permission to come near her. This is the meaning of, "I am Hashem, that is My name, and My glory will I not give to another" (Isaiah 42:8).