On July 11, 1804, Moore was summoned to the deathbed of Alexander Hamilton, who had been fatally wounded in a duel with Aaron Burr; Hamilton asked to receive holy communion. Moore made two objections: that to participate in a duel was a mortal sin, and that Hamilton, although he was undoubtedly a sincere Christian in his later years, was not an Episcopalian. Moore withdrew, but was persuaded by the urgent pleas of Hamilton's friends to return. On receiving Hamilton's solemn assurance that he repented for his part in the duel, Moore gave him communion.