Exodus 22:18 - Matthew Poole's English Annotations on the Holy Bible

i.e. Any person that is in league with the devil, and by his help either doth any mischief, or discovers and practices things above the reach of other men or women. Of which see Exodus 7:11 Leviticus 20:27 Deuteronomy 18:10 1 Samuel 28:9. The word is of the feminine gender, partly because women are most prone to these devilish arts, and most frequently guilty of them; and partly to intimate that no pity should be showed to such offenders, though they were of the weaker sex.