וַיִּשְׁמַ֗ע זְבֻל֙ שַׂר־הָעִ֔יר אֶת־דִּבְרֵ֖י גַּ֣עַל בֶּן־עָ֑בֶד וַיִּ֖חַר אַפּֽוֹ׃
And when Zebul the ruler of the city heard the words of Gaal the son of Ebed, his anger was kindled.
Read midrashic interpretation of Judges 9:30: and classical rabbinic exegesis.