The relevant verses can be found in Zechariah 5:5-11:
Then the angel that talked with me went forth, and said unto me, Lift up now thine eyes, and see what is this that goeth forth.
And I said, What is it? And he said, This is an ephah that goeth forth. He said moreover, This is their resemblance through all the earth.
And, behold, there was lifted up a talent of lead: and this is a woman that sitteth in the midst of the ephah.
And he said, This is wickedness. And he cast it into the midst of the ephah; and he cast the weight of lead upon the mouth thereof.
Then lifted I up mine eyes, and looked, and, behold, there came out two women, and the wind was in their wings; for they had wings like the wings of a stork: and they lifted up the ephah between the earth and the heaven.
Then said I to the angel that talked with me, Whither do these bear the ephah?
And he said unto me, To build it an house in the land of Shinar: and it shall be established, and set there upon her own base.
A woman is often used by the Lord in Scripture to represent moral or immoral systems. For example, the company of God's redeemed people are likened unto a pure woman: For I am jealous over you with godly jealousy: for I have espoused you to one husband, that I may present you as a chaste virgin to Christ, 2 Corinthians 11:2.