Zechariah 13:2

At that time the Lord also promised to remove idolatry, false prophets, and unclean spirits from the land. There would be external cleansing as well as internal. The Jews would "no longer ascribe supernatural powers to mere things, nor worship them as divine" (cf. Zechariah 10:2-3; Jeremiah 23:30-32; Jeremiah 27:9-10; Ezekiel 13:1 to Ezekiel 14:11). [Note: Baldwin, pp. 195-96.] False prophets, as is clear from the context, would not mislead the people (cf. Matthew 24:4-5; Matthew 24:11; Matthew 24:15; Matthew 24:23-24; 2 Thessalonians 2:2-4; Revelation 9:20; Revelation 13:4-15). The unclean spirits are the diviners, mediums, and demons who confused and afflicted the people in the past.

"The reference to the banishment of the unclean spirits out of the land . . . is the only passage in Scripture which explicitly refers to the imprisonment of demons during the kingdom age. But since Satan is remanded to the abyss (the prison house of evil spirits) during this era, as is clearly declared in Revelation 20:1-3, it is a necessary corollary that his demon aids shall also share the same fate." [Note: Unger, p. 225.]