When they told it to Jotham, he went and stood on the top of Mount Gerizim, and lifted up his voice, and cried, and said to them, Listen to me, you men of Shechem, that God may listen to you.
"Let fire come out from Abimelech and devour the men of Shechem; and let fire come out from the men of Shechem and devour Abimelech"  (Judges 9:20).  This was the curse of Jotham, and it was exactly fulfilled within the space of about three years.  See the last verse of this chapter for its fulfillment.