What is 7. An address (esp. an earnest or impressive address) containing instruction or exhortation; as, the charge of a judge to a jury; the charge of a bishop to his clergy called?

charge — 7. An address (esp. an earnest or impressive address) containing instruction or exhortation; as, the charge of a judge to a jury; the charge of a bishop to his clergy. (Webster's 1913.)