The Twelve were given authority over demons and disease.

¹And when he had called unto him his twelve disciples, he gave them power against unclean spirits, to cast them out, and to heal all manner of sickness and all manner of disease.

⁷And he called unto him the twelve, and began to send them forth by two and two; and gave them power over unclean spirits;

¹Then he called his twelve disciples together, and gave them power and authority over all devils, and to cure diseases.