They will pick up serpents [with their hands], and if they drink any deadly thing, it will not harm them. They will lay hands on the sick, and they will recover.” The Ascension of Jesus.
But you and your sons with you must take care to exercise your priesthood in whatever concerns the altar and the area within the veil. I give you your priesthood as a gift. Any unauthorized person who comes near shall be put to death. The Priests’ Share of the Sacrifices.