When Zebul the city's mayor heard the words of Gaal son of Ebed, his anger was kindled.
And when Zebul the ruler of the city heard the words of Gaal the son of Ebed, his anger was kindled.
When Zebul the city’s ruler heard the words of Gaal, Ebed’s son, he became angry.
For Zebul, the ruler of the city, upon hearing the words of Gaal, the son of Ebed, became very angry.