Charles Spurgeon Commentary Zechariah 13:4

"And it shall come to pass in that day, that the prophets shall be ashamed every one of his vision, when he prophesieth; neither shall they wear a hairy mantle to deceive:" — Zechariah 13:4 (ASV)

They shall give up this wicked employment at once and forever.

Just as when one who has pretended to tell fortunes is converted, and he forsakes that evil occupation; so converted people must never be in association with those who are familiar with the spirits of the dead, and who practice sorcery and other such abominations.

Everything of the kind is to be abhorred by godly people, and they must turn away from it with holy horror and disgust.

Imitating Elijah's garb, the false prophets hoped to win the attention of the people by the roughness of their dress; but all this would be dropped, for the people would be so well instructed that they would refuse to hear the false prophet.