Those figures of this sort are told "security is mortals' chiefest enemy" by Hecate after they refer to the title character as "Thane of Glamis" and "Thane of Cawdor," and note "fair is foul and foul is fair."
Henry Goodcole wrote a work about the Wonderful Discoverie of a person of this sort, which inspired a play in which a doggie named Tom turns Edmonton native Elizabeth Sawyer into one of these. Reginald Scott wrote a popular work of the 16th century arguing that these people don't exist, which inspired another play about this type of person by Thomas Middleton. That Middleton work, which is titled after a type of these, was incorporated into a play in which the presence of beards confuses another figure who encounters people of this sort at a heath outside of Forres. Those figures of this sort are told "security is mortals' chiefest enemy" by Hecate after they refer to the title character as "Thane of Glamis" and "Thane of Cawdor," and note "fair is foul and foul is fair." For 10 points, identify this sort of woman which in Macbeth is exemplified by the Weird Sisters.
Henry Goodcole wrote a work about the Wonderful Discoverie of a person of this sort, which inspired a play in which a doggie named Tom turns Edmonton native Elizabeth Sawyer into one of these.
witches (you can accept anything that describes the three witches in Macbeth before mention, like weird sisters)